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  • It's prime time to marvel at the moon

    Get a look at the moon's glories, interplanetary vistas and other outer-space highlights from February 2013.



    Anytime is a great time to gaze at the moon, but if you keep a close watch on Thursday night, you might actually see the moon move in its orbit.

    The moon passes through the sky from east to west every night, of course, but its orbital motion takes it from west to east against the background stars.

    You can notice that change from night to night, as the moon progresses from its new phase to the full moon. Thursday's night sky, however, provides a way to track the west-to-east movement during a shorter time frame: Starting at around 9:30 p.m. local time, the moon will creep past the bright star Spica in the constellation Virgo. Look closely, and you can watch the moon creep.

    Space.com's Joe Rao provides all the details about the encounter between the moon and Spica.

    Even if you miss the Spica spectacular, there will be plenty of opportunities for moongazing ahead. Earlier this week, folks in chilly northern regions snapped some great pictures of moon halos, which are caused by ice crystals high up in the atmosphere.

    "The angled faces of the six-sided crystals bend moonlight into circles 22 degrees in radius. ... Generally, the brighter the moon, the better the halo," SpaceWeather.com explains.

    We're featuring Norwegian photographer Steve Nilsen's spotlight shot of a moon halo in our Month in Space Pictures slideshow, and I'm also passing along Sebastien Saarloos' moon-halo picture from Alaska's Lower Miller Creek.

    For more marvelous pictures of the moon and Alaska's northern lights, check out Saarloos' Facebook page.

    Sebastian Saarloos

    Moonlight illuminates the scene at Lower Miller Creek in Alaska on Jan. 17. Ice crystals in the atmosphere refract the light to create a shining halo.


    Alan Boyle is NBCNews.com's science editor. Connect with the Cosmic Log community by "liking" the log's Facebook page, following @b0yle on Twitter and adding the Cosmic Log page to your Google+ presence. To keep up with Cosmic Log as well as NBCNews.com's other stories about science and space, sign up for the Tech & Science newsletter, delivered to your email in-box every weekday. You can also check out "The Case for Pluto," my book about the controversial dwarf planet and the search for new worlds.

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  • Past Antarctic warming linked to greenhouse gas

    Frédéric Parrenin

    A section of an Antarctic ice core shown under polarized light reveals the individual ice crystals.

    By Tia Ghose, LiveScience

    Rising carbon dioxide levels may have caused Antarctic warming in the past, new research strongly suggests.

    The findings, published Thursday in the journal Science, just add to the body of evidence that human-caused greenhouse gas emissions will lead to climate change.

    "It's new evidence from the past of the strong role of CO2 [carbon dioxide] in climate variation," said study co-author Frédéric Parrenin, a climate scientist at the CNRS in France.

    Past data
    Eons of the Earth's climate history are revealed deep within ice sheets in the Arctic and Antarctic. The Antarctic ice traps gas bubbles from the climate that can reveal what the ancient atmosphere looked like, while the ice itself can reveal historical temperatures.

    But gas bubbles from a given period get buried deeper than ice of the same period, making it hard to tie past temperatures with atmospheric changes.

    In the past, scientists using older techniques found that increases in carbon dioxide happened after global warming, not the reverse. [Images of Melt: Earth's Vanishing Ice]

    Past link
    But Parrenin and his colleagues wondered whether that was actually the case. To answer that question, the team looked at five ice cores that had been drilled from Antarctica over the last 30 years.

    They focused on ice from 20,000 to 10,000 years ago, which encompassed the last period when the planet warmed naturally and glaciers melted.

    The team measured the concentration of nitrogen-15 isotopes, or atoms of the same element with different weights, at different depths throughout the ice cores. They compared the depth of that isotope with the ice composition for all the cores to determine the distance between ice bubbles and ice from the same period.

    Global warming
    The team found that global warming and a carbon dioxide increase happened at virtually the same time — between 18,000 and 11,000 years ago.

    "It makes it possible that CO2 was the cause — at least partly — of the temperature increase during the courses of the last glaciation," Parrenin told LiveScience.

    And if increased carbon dioxide could lead to rising temperatures in the past, it also can in the present day, he said.

    The findings may deflate some climate skeptics, who used the poor dating of ice cores to question the link between carbon dioxide and warming, said Robert Mulvaney, a glaciologist with the British Antarctic Survey, who was not involved in the study.

    It also confirmed the view of most climate scientists that in the past, rising temperatures and carbon dioxide were locked in a feedback loop, where high temperatures led to more carbon dioxide being released from the deep oceans, which increased temperatures further, Mulvaney said.

    But because predictions of future warming are based on recent carbon dioxide and temperature data, not historical models, "it hasn't really changed anything about our understanding of how climate change will change our modern environment." Mulvaney told LiveScience.

    Follow Tia Ghose on Twitter @tiaghoseor LiveScience @livescience. We're also on Facebook & Google+

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Black hole's mystery 'wave' surprises scientists

    Gabriel Perez Diaz, Instituto de Astrofisica de Canarias (Servicio MultiMedia)

    This image is a simulation of the X-ray binary system Swift J1357.2-0933, a black hole and star system, in which the effect of a strange, vertical mystery structure are at their maximum.

    By Nola Taylor Redd, SPACE.com

    Astronomers studying an unusual black hole system have spotted a never-before-seen structure in the disk of matter encircling the system.

    Swift J1357.2, an X-ray binary system that regularly emits outbursts of high energy, consists of a black hole slowly consuming its companion star. Matter from the doomed star falls into the accretion disk, which surrounds the black hole, feeding it dust and gas.

    While observing the system, a team of scientists noticed an unusual vertical feature traveling through the material.

    "It's the first time we can resolve such [a] structure in an accretion disk, and it might be ubiquitous in X-ray binaries during the outburst state," Jesus Corral-Santana, of the Astrophysical Institute of the Canary Islands in Spain, told SPACE.com by email. [The Strangest Black Holes in the Universe]

    A hidden structure
    The black hole contained in Swift J1357.2 is one of the millions of stellar black holes that dot the Milky Way galaxy.

    About three times as massive as the sun, the behemoth likely formed when a single star collapsed inward on itself. The resulting, city-sized body packed a great deal of mass into a tiny package, creating a strong gravitational pull on nearby dust and gas.

    Located in the Virgo constellation, approximately 4,900 light-years from Earth, Swift J1357.2 also contains a small companion star, which has only a quarter the mass of the sun. This companion star orbits the pair's center of mass every 2.8 hours, one of the shortest known orbital periods for such systems.

    The black hole pulls material from the companion star into its accretion disk, occasionally emitting the X-ray bursts that enabled scientists to find this otherwise hard-to-spot system, researchers said.

    Corral-Santana and his team took hundreds of optical images of the system using the Isaac Newton and the William Herschel Telescopes, both of which are in the Canary Islands. Studying the light produced by the accretion disk, the researchers noticed a periodic dimming in the system, sometimes occurring over the course of only a few seconds.

    "Since the orbital period of the system is 2.8 hours, those dips cannot be produced by eclipses of the companion star. They are much faster," Corral-Santana said. "Therefore, they must be produced by a hidden structure placed very close to the black hole, in the inner accretion disk."

    The new find can only been seen in the outer, optical portion of the accretion disk, not on the inside, where X-ray bursts originate. The X-ray emission, which shows no periodic variation, unlike its optical counterpart, indicated a vertical structure was hiding the black hole, Corral-Santana said.

    Rather than appearing at a set, predictable time, the structure shows up over a steadily increasing period, indicating a wave-like movement through the accretion disk.

    "It is a wave produced in the accretion disk, moving outward," Corral-Santana said, "like the wave produced when a stone is dropped in calm water."

    The missing population
    The wave-like feature also provides information about the orientation of the black hole.

    Objects in space face Earth at a variety of angles, or inclinations. They can be seen edge-on, face-on or somewhere in between. Swift J1357.2 is the only one of 50 suspected similar black-hole systems found with an edge-on accretion disk — what scientists call a high inclination. However, astronomers think approximately 20 percent of these systems should provide such a perspective.

    In order to see the wave-like structure in the accretion disk, scientists must have such an edge-on view of the disk, or one close to it. A view from a lower inclination, closer to face-on, would not reveal the sudden rises and falls in the total light coming from the system.

    "Swift J1357.2 is the prototype of the hitherto missing population of high-inclination black holes in transient X-ray binaries," Corral-Santana said.

    Because Swift J1357.2 is the first such system to allow such an edge-on view, the presence of the vertical structure takes on an added significance. No signs of such structures appear in other similar systems, but that could result simply from their unfortunate angles. Such structures could in fact exist in other, previously discovered transient X-ray binary systems, hidden only by their observational angles.

    The findings were published online Feb. 28 in the journal Science.

    Follow SPACE.com on Twitter @Spacedotcom. We're also on Facebook & Google+

    Copyright 2013 SPACE.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Just what the world needs: 3 new cockroach species

    Zongqing Wang

    This image shows the back and front of Pseudophoraspis recurvata, one of the newly described species.

    By LiveScience

    Cockroaches have been crawling on the planet since before the time of the dinosaurs, and today there are more than 4,500 species known to science. Researchers are adding three more to that list.

    Though they fall into the giant cockroach family (Blaberidae) these newly found, yellow-bodied creatures are small compared with some of their cousins — they grow just a little more than an inch (3 centimeters) in length in adulthood, compared with Blaberus giganteus, for example, which can reach lengths of 4 inches (10 cm).

    The recently discovered insects are the first of the genus Pseudophoraspism to be found in China, researchers say. Until now, cockroaches of that genus had only been documented in Southeast Asia, never north of Vietnam.

    "We found three new species from China, located in Hainan, Yunnan and Guangxi Provinces respectively, which extends the range of the genus Pseudophoraspis northward," entomologist Zongqing Wang of China's Southwest University said in a statement.

    The new species — which are named Pseudophoraspis clavellata, Pseudophoraspis recurvata and Pseudophoraspis incurvata — were described online this week in the journal ZooKeys.

    Follow LiveScience on Twitter @livescience. We're also on Facebook and Google+.

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • The buzz stops here: Bumblebees are in trouble

    Johanna James-Heinz / AP

    The photo provided by amateur Illinois bee spotter Johanna James-Heinz shows a rusty-patched bumblebee, on Aug. 14, 2008, in Peoria, Ill. It is one of four types of bumblebees researchers say is in trouble.

    By Seth Borenstein
    AP

    WASHINGTON — It's not just honey bees that are in trouble. The fuzzy American bumblebee seems to be disappearing in the Midwest.

    Two new studies in Thursday's journal Science conclude that wild bees, like the American bumblebee, are increasingly important in pollinating flowers and crops that provide us with food. And, at least in the Midwest, they seem to be dwindling in an alarming manner, possibly from disease and parasites.

    Wild bees are difficult to track so scientists have had a hard time knowing what's happening to them. But because of one man in a small town in Illinois in the 1890s, researchers now have a better clue.

    Naturalist Charles Robertson went out daily in a horse-drawn buggy and meticulously collected and categorized insects in Carlinville in southern Illinois.

    More than a century later, Laura Burkle of Montana State University went back to see what changed. Burkle and her colleagues reported that they could only find half the species of wild bees that Robertson found — 54 of 109 types.

    "That's a significant decline. It's a scary decline," Burkle said Thursday.

    And what's most noticeable is the near absence of one particular species, the yellow-and-black American bumblebee. There are 4,000 species of wild bees in America and 49 of them are bumblebees. In the Midwest, the most common bee has been Bombus pensylvanicus, known as the American bumblebee. It only stings defensively, experts say.

    But in 447 hours of searching, Burkle's team found only one American bumblebee, a queen.

    That fits with a study that University of Illinois entomologist Sydney Cameron did two years ago when she found a dramatic reduction in the number and range of the American bumblebee.

    "It was the most dominant bumblebee in the Midwest," Cameron said, saying it now has pretty much disappeared from much of its northern range. Overall, its range has shrunk by about 23 percent, although it is still strong in Texas and the West, she said.

    "People call them the big fuzzies," Cameron said. "They're phenomenal animals. They can fly in the snow."

    Her research found four species of bumblebees in trouble: the American bumblebee, the rusty-patched bumblebee, the western bumblebee and the yellow-banded bumblebee.

    A separate Science study by a European team showed that wild bees in general have a larger role in pollinating plants than the honey bees that are trucked in to do the job professionally.

    Those domesticated bees are already in trouble with record high prices for bees to pollinate California almond trees, said David Inouye at the University of Maryland.

    Scientists suspect a combination of disease and parasites for the dwindling of both wild and domesticated bees.

  • Safety is key to private spaceflight's success

    Luke Colby / Virgin Galactic

    SpaceShipTwo undertook its 23rd glide flight on Dec. 19 in the pre-powered portion of its incremental test flight program. This was a significant flight as it was the first with rocket motor components installed, including tanks. It was also the first flight with thermal protection applied to the spaceship's leading edges.

    By Mike Wall
    Space.com

    PALO ALTO, Calif. — Commercial human spaceflight will need to be much safer than the space shuttle for the industry to really take off, experts say.

    NASA's venerable space shuttle program suffered two fatal accidents in its 30 years of orbital service — the 1986 Challenger tragedy and the 2003 destruction of Columbia, both of which killed all seven astronauts on board.

    The space shuttle fleet blasted off a total of 135 times before its retirement in 2011, giving the iconic vehicle a fatal-accident rate of about 1.5 percent. Private spaceflight companies will have to do considerably better than that if they hope to build a viable industry, observers say.

    "It's going to have to be at least perceived as being relatively safe," George Nield, associate administrator for commercial space transportation at the U.S. Federal Aviation Administration, said here earlier this month during a space-entrepreneurship forum organized by Stanford University's Institute for Economic Policy Research. [Space Travel: Danger at Every Phase (Infographic)]

    XCOR Aerospace

    Lynx with Dorsal payload Pod showing ATSA Telescope Payload (Lynx Mk. III USA only).

    What 'safe' means for spaceflight
    While the industry should do its best to prevent accidents, "safe" does not mean no mishaps at all, Nield said, as that's an impossible standard to meet. Planes crash occasionally, after all, but many millions of people still travel regularly by air.

    Indeed, the private spaceflight industry should look for inspiration to commercial aviation, which averages about one fatal accident per 1 million operations, he added.

    "Will we ever get that kind of safety record for space? I don't know," Nield said. "It's hard. Our difficult environment, more expensive — there's a lot of reasons why we might not be able to get quite that good. But it's a good target to shoot for."

    Preparing for the inevitable
    Commercial spaceflight companies need to prepare themselves, their customers and the nation for the inevitability of accidents, however rare they turn out to be, Nield and others said.

    It's particularly important for Congress to be informed, to minimize the chances that a mishap inspires a wave of reactionary and potentially industry-crushing regulation.

    "You start telling legislators now — it's not a matter of if, it's a matter of when," said Andrew Nelson, chief operating officer of XCOR Aerospace, which is selling seats on its suborbital Lynx spacecraft for $95,000 each.

    Nield agreed, stressing the need for all the players in the emerging industry to work together on this subject, sensitive though it may be.

    "We shouldn't pretend that this is going to be free of risk," Nield said. "We need to work together as a community — industry, government — and help the public, the media and our leaders in Congress and the administration to understand the risks involved and the benefits. That is probably the most important thing we can do."

    Follow Space.com senior writer Mike Wall on Twitter @michaeldwall or Space.com @Spacedotcom. We're also on Facebook and Google+.

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • The Arctic in a pool: Simulator grows sea ice for research

    Feiyue Wang

    Frost flowers are among the ice structures grown at the Sea-ice Environmental Research Facility in Winnipeg, Canada.

    By Elizabeth Howell
    LiveScience

    This winter, flowers bloomed in the northern Canadian city of Winnipeg. But not the verdant blooms that might come to mind; these were frost flowers.

    The University of Manitoba opened a sea ice simulator last year to see how ice forms on the open water of the frigid poles, and how it affects the local climate and plant life.

    The $1.5 million Canadian ($1.46 million USD) Sea-ice Environmental Research Facility's 30-foot-long (9 meters) pool — the centerpiece of the project — is where the researchers sprinkle salt, water and environmental contaminants, then watch how the sea ice grows.

    The facility runs during the winter, when the outdoor temperature is below 28.9 Fahrenheit (minus 1.7 degrees Celsius), the temperature at which ice forms.

    "The real beauty is we can add (chemical or biological) tracers to it and use the sensors to monitor it in real time," said Feiyue Wang, an environmental chemist who leads the facility.

    Feiyue Wang

    Researchers are looking to simulate Arctic ice with this 30-foot-long pool at the Sea-ice Environmental Research Facility in Winnipeg.

    "As an experimental scientist, I always like to do control experiments. What if we hold some variables constant? What if we change them? You can't do that in the Arctic," Wang told OurAmazingPlanet.

    Ice experiments
    Frost flowers are one of the types of ice they can grow at the facility. These structures form around salt on the surface of the ice, and host a wealth of microbes that can survive in harsh Arctic environments. Previous research found that they contain far more salt than the surrounding waters.

    "If they can concentrate salt, they can concentrate other chemicals in seawater," Wang said, adding that pollutants would be among the chemicals.

    The challenge is trying to track down these structures. In the isolated north, scientists rely on remote sensing from satellites to take their research vessel to the correct location. However, it's difficult to pick out the frost flowers from the surrounding ice. [10 Things You Need to Know About Arctic Sea Ice]

    Sara Wang

    Researchers collect frost flowers for chemical analysis at the Sea-ice Environmental Research Facility.

    At the facility last year, the researchers watched frost flowers over three days using one particular band of radiation. Their goal was to figure out how to position the sensor to best see the flowers. A paper on the research, led by the University of Manitoba's Dustin Isleifson, will be published in a future issue of the journal Transactions on Geoscience and Remote Sensing.

    Future plans
    More research papers are forthcoming on acidity in the sea ice environment, as well as how carbon is exchanged with the ice, which would help tease out the effects of climate change from carbon dioxide on the Arctic ocean environment.

    Within the next few years, the researchers aim to enhance their "simulation" by taking a sheet of ice from the Arctic and laying it inside the pool to do controlled bacteria studies.

    The researchers are also laying the groundwork for a facility expansion that would allow them to study oil spills in the sea ice environment. The first concrete step will be to obtain funding, which the researchers are working on now.

    Follow Elizabeth Howell @howellspace, or LiveScience on Twitter @livescience. We're also on Facebook and Google+.

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Dust from Africa affects snowfall in California

    AP Photo / Jessie Creamean / NOAA

    This 2011 image provided by the National Oceanic and Atmospheric Administration shows a field survey site in California's Sierra Nevada mountains. A new study published Thursday found snowfall in the Sierras was influenced by dust and microbes from as far away as Africa.

    By Alicia Chang
    AP

    LOS ANGELES — One of the driest spots on Earth — the Sahara desert — is increasingly responsible for snow and rain half a world away in the western U.S., a new study released Thursday found.

    It's no secret that winds carrying dust, soot and even germs make transcontinental journeys through the upper atmosphere that can affect the weather thousands of miles away. Yet little is known about the impact of foreign pollutants on the West Coast, which relies on mountain snowmelt for its water needs.

    Previous studies hinted these jet-setting particles may retard rainfall in the Sierra Nevada mountains in Northern California by reducing the size of water droplets in clouds. But scientists who flew through storm clouds in an aircraft, measured rain and snow and analyzed satellite imagery found the opposite: Far-flung dust and germs can help stimulate precipitation.

    During the 2011 winter, a team from the University of California, San Diego and National Oceanic and Atmospheric Administration traced particles suspended in clouds over the Sierra to distant origins — from the skies over the arid Sahara that later mingled with other pollutants in China and Mongolia before crossing the Pacific.

    The days with the most particles in the clouds were also "days when we see the most snow on the ground," said study leader Kimberly Prather, an atmospheric chemistry professor at UC San Diego, whose study was published online Thursday in the journal Science.

    Scientists believe wafting dust, grit and microbes — including bacteria and viruses — can spur the formation of ice crystals in clouds that in turn can influence how much rain or snow falls.

    For years, governments and utilities in California and other Western states have used cloud seeding, in which a chemical vapor is sprayed into clouds, in a bid to increase rainfall.

    The new study shows how "Mother Nature has figured out how to give us more precipitation" and that may lead to changes in cloud-seeding efforts, which can be hit-or-miss, Prather said.

    David J. Smith at the NASA Kennedy Space Center said it was refreshing to see measurements from the ground, air and orbit to tackle how airborne particles affected Northern California snowfall.

    "Such a comprehensive approach is the only way to thoroughly examine global transport" of particles, Smith, who had no role in the research, said in an email.

    Online: Science 

  • Astronaut witnesses Mount Etna's blast of ash

    Chris Hadfield / CSA via Twitter

    Canadian astronaut Chris Hadfield snapped this photo of Italy's Mount Etna from the International Space Station.

    By Becky Oskin
    Our Amazing Planet

    Astronaut Chris Hadfield, the planet's most popular space shutterbug, snapped a spectacular photo of Italy's Mount Etna volcano streaming ash toward the sea early Thursday.

    The volcano experienced the latest in a series of strong paroxysms, or short violent bursts, on Wednesday. For the first time, explosions and ash spewed into the air from Mount Etna's Voragine crater, while webcams trained on the fiery summit showed activity at Bocca Nuova crater as well.

    Mount Etna's current eruption started with a stunning dawn lava fountain on Feb. 19, caught on video, followed in quick succession by three more paroxysms over the next two days. Then, on Feb. 23, lava fountains shot out from Bocca Nuova crater to a height of more than 2,600 feet (800 meters).

    Ash cloaks the volcano's snow-covered slopes, but not enough to deter skiers. Small lava flows have also emerged from the most active craters. The volcano has four distinct craters at its summit: the two central craters, Bocca Nuova and Voragine; the northeast crater; and a new southeast crater.

    Hadfield, an astronaut for the Canadian Space Agency, is aboard the International Space Station. He regularly posts amazing images of Earth on his Twitter feed.

    See more of astronaut Chris Hadfield's photos from the International Space Station, plus lots of other cosmic views, in the Month in Space Pictures slideshow for February.

    Reach Becky Oskin at boskin@techmedianetwork.com. Follow her on Twitter @beckyoskin. Follow OurAmazingPlanet on Twitter @OAPlanet. We're also on Facebook and Google+.

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Rock on! Rare 40-pound meteorite found in Antarctica

    International Polar Foundation

    The fifth-largest meteorite ever found in East Antarctica was discovered Jan. 28 by an international team of meteorite hunters. "This is the biggest meteorite (40 pounds) found in East Antarctica for 25 years," one geologist said.

    By Becky Oskin
    LiveScience

    Meteorite hunters at the bottom of the world bagged a rare find this southern summer: a 40-pound (18 kilogram) chunk of extraterrestrial rock.

    A team from Belgium and Japan discovered the hefty meteorite as the members drove across the East Antarctic plateau on snowmobiles. Initial tests show it is an ordinary chondrite, the most common type of meteorite found on Earth, Vinciane Debaille, a geologist from Université Libre de Bruxelles in Belgium, said in a statement.

    "This is the biggest meteorite found in East Antarctica for 25 years," Debaille said. "This is something very exceptional. When you find such a meteorite on Earth, it means that when it was in the sky, it was much larger." [Images of the Antarctic meteorite.]

    The Russian meteor that burst into fragments above the Chelyabinsk region on Feb. 15 is also an ordinary chondrite, according to initial tests by Russian scientists.

    International Polar Foundation

    More than 38,000 meteorites have been found in Antarctica, but only 30 bigger than 40 pounds (18 kg). This big meteorite found in Antarctica is an ordinary chondrite.

    Every year, scientists travel to Antarctica to search for meteorites. Their charred black crust stands out starkly in the white snow, and the cold, dry climate helps preserve any organic chemicals inside the rocks.

    The expedition collected 425 meteorites in 40 days, with a total weight of 165 pounds (75 kg). Debaille said they may have found one Mars meteorite and one piece of the asteroid Vesta among the many discoveries.

    The researchers canvassed the Nansen Ice Field, 86 miles (140 kilometers) south out of the International Polar Foundation's Princess Elisabeth station. The United States also sent scientists out on the polar ice to collect meteorites this season, from McMurdo Station on the opposite end of the continent.

    Reach Becky Oskin at boskin@techmedianetwork.com. Follow her on Twitter @beckyoskin. Follow OurAmazingPlanet on Twitter @OAPlanet. We're also on Facebook and Google+.

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • New radiation belt around Earth stuns scientists -- then it's gone

    NASA / Van Allen Probes / Goddard Space Flight Center

    Two giant swaths of radiation, known as the Van Allen Belts, surrounding Earth were discovered in 1958. In 2012, observations from the Van Allen Probes showed that a third belt can sometimes appear. The radiation is shown here in yellow, with green representing the spaces between the belts.

    By Charles Q. Choi
    Space.com

    A ring of radiation previously unknown to science fleetingly surrounded Earth last year before being virtually annihilated by a powerful interplanetary shock wave, scientists say.

    NASA's twin Van Allen space probes, which are studying the Earth's radiation belts, made the cosmic find. The surprising discovery — a new, albeit temporary, radiation belt around Earth — reveals how much remains unknown about outer space, even those regions closest to the planet, researchers added.

    After humanity began exploring space, the first major find made there were the Van Allen radiation belts, zones of magnetically trapped, highly energetic charged particles first discovered in 1958.

    "They were something we thought we mostly understood by now, the first discovery of the Space Age," said lead study author Daniel Baker, a space scientist at the University of Colorado.

    These belts were believed to consist of two rings: an inner zone made up of both high-energy electrons and very energetic positive ions that remains stable in intensity over the course of years to decades; and an outer zone comprised mostly of high-energy electrons whose intensity swings over the course of hours to days depending primarily on the influence from the solar wind, the flood of radiation streaming from the sun. [How NASA's Twin Radiation Probes Work (Infographic)]

    NASA / SDO / AIA / Goddard Space Flight Center

    Last August 31, a giant prominence on the sun erupted, sending out particles and a shock wave that traveled near Earth. This event may have been a cause of a third radiation belt that appeared around Earth days later, a phenomenon that was observed for the first time by the newly launched Van Allen Probes. This image of the prominence before it erupted was captured by NASA's Solar Dynamics Observatory.

    The discovery of a temporary new radiation belt now has scientists reviewing the Van Allen radiation belt models to understand how it occurred.

    Radiation rings around Earth
    The giant amounts of radiation the Van Allen belts generate can pose serious risks for satellites. To learn more about them, NASA launched twin spacecraft, the Van Allen probes, in the summer of 2012.

    The satellites were armed with a host of sensors to thoroughly analyze the plasma, energetic particles, magnetic fields and plasma waves in these belts with unprecedented sensitivity and resolution.

    Unexpectedly, the probes revealed a new radiation belt surrounding Earth, a third one made of super-high-energy electrons embedded in the outer Van Allen belt about 11,900 to 13,900 miles (19,100 to 22,300 kilometers) above the planet's surface. This stable ring of space radiation apparently formed on Sept. 2 and lasted for more than four weeks.

    "The feature was so surprising, I initially foolishly thought the instruments on the probes weren't working properly, but I soon realized the lab had built such wonderful instruments that there wasn't anything wrong with them, so what we saw must be true," Baker said.

    NASA

    The Radiation Belt Storm Probes Mission, part of NASA's Living With a Star program, will provide unprecedented insight into the physical dynamics of the radiation belts.

    This newfound radiation belt then abruptly and almost completely disappeared on Oct. 1. It was apparently disrupted by an interplanetary shock wave caused by a spike in solar wind speeds.

    "More than five decades after the original discovery of these radiation belts, you can still find new unexpected things there," Baker said. "It's a delight to be able to find new things in an old domain. We now need to re-evaluate them thoroughly both theoretically and observationally."

    A radiation mystery
    It remains uncertain how this temporary radiation belt arose. Van Allen mission scientists suspect it was likely created by the solar wind tearing away the outer Van Allen belt.

    "It looks like its existence may have been bookended by solar disturbances," Baker said.

    Future study of the Van Allen belts can reveal if such temporary rings of radiation are common or rare.

    "Do these occur frequently, or did we get lucky and see a very rare circumstance that happens only once in a while?" Baker said. "And what other unusual revelations might come now that we are really looking at these radiation belts with new, modern tools?"

    The scientists detailed their findings online Thursday in the journal Science.

    Follow Space.com on Twitter @Spacedotcom. We're also on Facebook and Google+.

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Legal horn trade could save rhinos from cliff of extinction, experts argue

    Geoff York

    This image shows a de-horned white rhino and its calf. A new paper argues that humanely harvesting rhino horn could save the animals from extinction.

    Surging demand for rhino horn to decorate daggers and treat everything from hangovers to cancer is driving the iconic animals to the brink of extinction. The only way to save them is to humanely harvest rhino horn and sell it legally, scientists argue in a controversial new paper.

    Only 5,000 black rhinos and 20,000 white rhinos remain, mostly in South Africa and Namibia, the scientists note. The western black rhino was declared extinct in 2011.

    The paper, published Thursday in the journal Science, is a bid to spark "serious discussions around establishing a legal trade" at an international conference on the trade in endangered species that starts Sunday in Bangkok, lead author Duan Biggs told NBC News.


    Edna Molewa, South Africa's water and environment affairs minister, told reporters Thursday that the government would consider "extraordinary measures" to save the rhino from poaching, including a legal trade. 

    "We have been given a mandate by Cabinet not to close our ears to potential and possible trading in rhino horn," she said, and at this year’s conference, South Africa "would listen and gather as much information as possible" on what should be done about trading, Business Day reported

    Humane trade
    Trade in rhino horn was banned under the Convention on the Trade of Endangered Species (CITES) in 1977. Since then, demand for the horn has been met by poachers, who typically kill the rhinos before hacking off their horns.

    Just days after Rock Center aired Harry Smith's report, "The Last Stand," on the growing epidemic of illegal rhino poaching in South Africa, three of the rhinos featured in the report were attacked by poachers. Rock Center's Harry Smith reports.

    "The trade ban restricts supply and that pushes up the price of horn, which increases incentives for poaching and has caused skyrocketing poaching levels," said Biggs, who is a researcher at the Australian Research Council Center of Excellence for Environmental Reporting.

    Today’s street value of rhino horn is about $65,000 per kilogram (2.2 pounds), making it worth more by weight than gold, diamonds, or cocaine, according to the paper. As a result of the high prices, the number of rhinos poached has more than doubled each year over the past five years. 

    Biggs and colleagues argue that the demand for horn can be met by legally shaving horn from a herd of about 5,000 live animals kept on private conservation lands in South Africa. This would lower prices, lure buyers of horn to the legal market, reduce incentives to poachers and thus reduce poaching.

    Rhino horn is largely composed of keratin, a protein also found in fingernails and hair. It regrows when cut at a rate of about 0.9 kilograms a year. For about $20, a rhino can be sedated long enough for its horn to be harvested, Biggs and colleagues note.

    "It is a product that can be delivered to the market sustainably and humanely and in a way that has broader conservation benefits," Biggs said. For example, sale of the horn could be used to strengthen anti-poaching efforts.

    Poachers 'very nasty people'
    Sam Wasser is a conservation biologist at the University of Washington in Seattle who has led global efforts to end the illegal ivory trade, which is run by sophisticated crime syndicates motivated by the huge profits in the wildlife trade. 

    In South Africa, home to three quarters of the last remaining rhinos on the planet, a spike in rhino poaching is threatening the white rhino's survival. NBC News' Harry Smith reports for "Rock Center."

    He said the rhino poachers are the same people who poach elephants, describing them to NBC News as "very nasty people that really want to make a lot of money." The paper calling for a legal trade in rhino horn, he said, "grossly underestimates the impact of organized crime on this trade."

    In South Africa alone, 668 rhino were killed in 2012; 448 were killed there in 2011. The sharp rise is largely attributed to a rumor that the horn is a cure for cancer. Studies show that it is not. "That's essentially a marketing ploy by organized crime to increase the value and demand for horn," Wasser said.

    In order for a legal trade to be effective, he noted, it would need to lower the price of horn from $65,000 to a few hundred dollars per kilogram. "Poachers are going to be trying as hard as they can to get the last rhinos to capitalize on that high price before the price drops, if it ever does," Wasser said.

    He added that poaching of elephants increases in the months prior to CITES meetings whenever countries propose a legal sale of ivory because the poachers scramble to benefit from higher prices. He expects the same to happen with a legal rhino horn trade.

    If so, the only surviving rhinos will be those under tight security on private lands in South Africa. "They won’t be natural rhinos," Wasser said.

    The more effective approach to saving rhinos, he argued, is to focus efforts on breaking apart the crime syndicates that control the ivory trade. "If you do that, you also get the rhino poaching under control because it is the same organized crime groups that are doing this," he said.

    This could be easier than it sounds, Wasser added. He works with Interpol, the international criminal police organization, to genetically track the origin of seized ivory. They’ve found most of it comes from a few hotspots. Focusing law enforcement on those hotspots, he said, could shut down the illegal trade.

    No silver bullet
    Cathy Dean, executive director of Save the Rhino International, a London-based non-profit group, told NBC News that "there is no one silver bullet that is going to solve the rhino-poaching crisis."

    Those pushing for legal trade agree that anti-poaching efforts will need to be maintained and policies must be in place to ensure that local communities in and around rhino areas benefit from the sale of horn, for example.

    "Broadly speaking, we are in favor of sustainable use and of reducing reliance on donor funding, so the option of legalizing the trade in rhino horn is of interest," Dean said. "But, there are many, many preconditions that must be met before we could support such a measure."

    Duan Biggs

    A white rhino is shown here in South Africa's Kruger National Park. Rhino horn sells on the black market for $65,000 per kilogram. That's more valuable than cocaine.

    For example, she noted, South Africa must find a trading partner for the horn. So far the governments of China and Vietnam, where most of the illegally harvested horn is sold, have shown no willingness to participate in a legal trade.

    WWF, the conservation organization, said in a statement that private landowners in South Africa are to be applauded for their efforts in rhino conservation, and that "it is vitally important to keep incentives in place" to ensure their continued involvement.

    "At the same time, there are legitimate concerns that establishing a legal avenue of horn trade under current circumstances could produce a range of unintended consequences that would undermine the conservation efforts of WWF and its partners."

    For example, a legal horn market could serve as a conduit for laundering illegal rhino horn, increase consumer demand and undermine existing law enforcement.

    "The situation is not stable enough to entertain any consideration of legal trade in rhino horn," the WWF said.

    Biggs acknowledged that the proposal for a legal trade is controversial, but said it is worth trying. "What we know is that the current situation is certainly not working," he said. "It is failing to conserve rhinos and it comes at taking away resources from other conservation efforts."

    More about endangered rhinos:

    John Roach is a contributing writer for NBC News. To learn more about him, check out his website.

  • Viruses pass major test to enter ranks of living

    By Jennifer Viegas
    DiscoveryNews

    Viruses can acquire fully functional immune systems, according to new research that bolsters the controversial theory that viruses are living creatures.

    Until now, scientists thought that viruses existed only as primitive particles of DNA or RNA, and therefore lacked the sophistication of an immune system.

    The study, published in the journal Nature, is the first to show that a virus can indeed possess an immune system, not to mention other qualities commonly associated with complex life forms.

    The belief that viruses are living creatures “stems from the fact that viruses have their own complex genome, they replicate to make more of themselves, and they are evolving,” co-author Andrew Camilli of the Tufts University School of Medicine told Discovery News.

    PHOTOS: The Art of Microbiology

    The use of a complex immune system “doesn’t prove” that viruses are living beings, “but it does add to the argument,” he said.

    Living organisms are typically defined as being capable of vital functions, such as the ability to grow and adapt to the environment over successive generations. Viruses are now on the fence between being considered a biological entity and an actual living creature.

    Camilli and his colleagues focused their investigation on a viral predator of cholera bacteria. This type of virus is known as a bacteriophage (“phage” for short).

    Lead author Kimberley Seed, a postdoctoral fellow in Camilli’s lab, was analyzing DNA sequences of phages taken from stool samples of Bangladesh cholera patients. She was surprised to find genes for a functional immune system previously only found in some types of bacteria.

    To verify the discovery, she and her colleagues used phages both with and without the immune system to infect a new strain of cholera bacteria. Only the virus harboring the immune system readily killed the cholera bacteria.

    Not only can some viruses have an immune system, some also can steal them from bacteria.

    The scientists found that viruses can capture immunity genes from bacteria during a phase when “the viral genome is being replicated into dozens of copies within the infected host cell,” Camilli explained. The virus therefore steals an immune system from the bacteria. This benefits the phage virus.

    NEWS: Giant Viruses Are Ancient Living Organisms

    “The immune system allows the phage to target and destroy specific inhibitory genes of the host cell by literally cutting the target genes into pieces,” Seed told Discovery News. By disarming these genes, “the phage essentially disarms the host cell, and can then proceed with the infection and kill the host cell.”

    While we tend to associate both viruses and bacteria with health threats, that is not always the case. In this instance, the virus winds up on the side of humans.

    Camilli explained that “phages are killers of bacteria. If the species of bacteria they happen to kill is a human pathogen, then the phage is doing us a favor.”

    The researchers hope that this activity could battle “superbugs,” which are bacteria with a resistance to most are all current antibiotics.

    Contagion: Is a Killer Virus Out There?

    Mammals, including humans, possess immune systems that, unlike those of bacteria, are encoded on much larger pieces of DNA.

    “It would be very difficult, if not impossible, for a virus to capture (such an immune system),” Camilli said.

    “A second consideration is that the virus has to have a good use for the captured immune system in order to hang onto it,” he added. “In the case of a phage, we have shown that it can use the captured immune system to good effect. This may or may not be true for another type of immune system, should a virus be able to capture it.”

    Sylvain Moineau, a professor in the Department of Biochemistry, Microbiology and Bioinformatics at Université Laval, is one of the world's leading experts on bacteriophages. Moineau told Discovery News that the discovery of a phage with an immune system "is a remarkable finding. Phages always seem to find a way to impress us."

    Moineau and colleague Manuela Villion remind that phages are among the most abundant biological entities on the planet, outnumbering their bacterial hosts tenfold. Whether they and other viruses represent living organisms, however, is still up for debate.

  • Scientists watch birth of alien planet

    L. Calcada / ESO

    This artist's impression shows the formation of a gas giant planet in the ring of dust around the young star HD 100546. This system is also suspected to contain another large planet orbiting closer to the star.

    By Clara Moskowitz
    Space.com

    Astronomers have captured what may be the first-ever direct photograph of an alien planet in the process of forming around a nearby star.

    The picture, which captured a giant alien planet as it is coming together, was snapped by the European Southern Observatory's Very Large Telescope in Chile. It shows a faint blob embedded in a thick disk of gas and dust around the young star HD 100546. The object appears to be a baby gas giant planet, similar to Jupiter, forming from the disk's material, scientists say.


    "So far, planet formation has mostly been a topic tackled by computer simulations," astronomer Sascha Quanz of ETH Zurich in Switzerland, leader of the research team, said in a statement. "If our discovery is indeed a forming planet, then for the first time scientists will be able to study the planet formation process and the interaction of a forming planet and its natal environment empirically at a very early stage."

    The star HD 100546, which lies 335 light-years from Earth, was already thought to host another giant planet that orbits it about six times farther out than Earth is from the sun. The new potential planet lies even farther, about 10 times the distance of its sibling, at roughly 70 times the stretch between the Earth and sun. [Giant Planet In the Making Spotted? (Video)]

    The possible planet seems to fit the picture scientists are building of how worlds form. Stars themselves are born in clouds of gas and dust, and after they  form, a disk of leftover material often orbits them. From this disk, baby planets can take shape. That's what appears to be happening here.

    For example, the new photo reveals structures in the disk surrounding the star that could be caused by interactions between its material and the forming planet. Furthermore, the data suggest that the material around the planet-blob has been heated up, which is consistent with the planet-forming hypothesis.

    Ardila et al. / ESO / NASA / ESA

    This composite image shows views of the gas and dust around the young star HD 100546, as seen by the Hubble Space Telescope (left) and from the NACO system on the European Southern Observatory's Very Large Telescope (right).

    The observations were made possible by the NACO adaptive optics instrument on the Very Large Telescope, which compensates for the blurring caused by Earth's atmosphere. The instrument also uses a special coronagraph that observes in near-infrared wavelengths to block out the bright light from the star, so as to see its surroundings better.

    "Exoplanet research is one of the most exciting new frontiers in astronomy, and direct imaging of planets is still a new field, greatly benefiting from recent improvements in instruments and data analysis methods," said Adam Amara, another member of the team. "In this research we used data analysis techniques developed for cosmological research, showing that cross-fertilization of ideas between fields can lead to extraordinary progress."

    The findings are detailed in a paper to appear online in Thursday's issue of Astrophysical Journal Letters.

    Follow Clara Moskowitz on Twitter @ClaraMoskowitz or Space.com @Spacedotcom. We're also on Facebook and Google+

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Lice genes may shed light on human migration

    Sean Gallup / Getty Images file

    Head lice, also known as pediculosis capitis, cause itching and outrage when they're detected, most often on the heads of schoolchildren. Increasingly, the bugs are becoming resistant to common pesticides.

    By Tia Ghose
    LiveScience

    Lice genes could offer insights into human migration, according to new research.

    The new analysis also suggests that efforts to eradicate the blood-sucking parasites may need to focus on local populations, rather than trying to tackle the creatures globally.

    The findings, published Wednesday in the journal PLOS ONE, could help scientists understand how lice evolve resistance to insecticides.

    Human hitchhikers
    Lice have fed off primates for more than 25 million years, although they may have first become a human scourge when humans donned clothes.

    As humans conquered the globe, these parasitic hitchhikers went along for the ride. Past work had studied the genetics of lice, but relied on DNA that passes on from the maternal line, making it difficult to get a complete picture of human migration. [Tiny & Nasty: Images of Things That Make Us Sick]

    Towards that end, Marina Ascunce, an entomologist at the Florida Museum of Natural History Museum, and her colleagues analyzed nuclear DNA, genetic material that is passed on from both male and female lice, in 75 specimen from 10 sites across four regions: Asia, North America, Central America, and Europe. They also collected clothing lice from people in Nepal and Canada.

    Past migration
    They found that lice from Honduras closely resembled Asian lice.

    "Lice from Honduras may have been brought by the first people in America, and that's why we see this closer genetic affinity," Ascunce told LiveScience.

    By contrast, lice from New York were more closely related to European parasites, likely reflecting North America's waves of European colonization over the centuries, Ascunce said.

    In addition, because there is not much gene flow between different lice populations, insecticides could be more effective if they target genetic vulnerabilities specific to local populations, she said.

    While the study is preliminary, a more thorough sampling of worldwide lice could provide insight into why head lice differ from clothing lice, which harbor in clothing and can spread deadly diseases.

    Genetic analysis could also reveal when and where humans interbred with Neanderthals and other archaic hominid species, the researchers write in the paper.

    Follow Tia Ghose on Twitter @tiaghose or LiveScience @livescience. We're also on Facebook and Google+

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Deep-space missions taking aim at Mars

    NASA

    An artist's rendering of the Multi-Purpose Crew Vehicle on a deep-space mission.

    By Miriam Kramer
    Space.com

    CAPE CANAVERAL Fla. — The announcement Wednesday of an ambitious new project to launch the first private manned mission to Mars in 2018 may suggest to some that NASA has lost a step in the pursuit of deep-space exploration. But the U.S. space agency is forging ahead with plans for a flexible new spaceship and rocket to send astronauts deeper into space than ever before.

    The nonprofit Inspiration Mars Foundation unveiled plans for a private Mars flyby mission Wednesday that calls for a January 2018 launch of a two-person crew — a man and woman, possibly a married couple — on a 501-day trip to the Red Planet and back. The mission would not land on Mars but bring a capsule and inflatable module within 100 miles (160 kilometers) of the Martian surface before zooming away back to Earth.

    Just one hour after the Inspiration Mars Foundation announcement in Washington, D.C., NASA officials here at the Kennedy Space Center briefed reporters about the agency's own plans for deep-space missions, including an eventual Mars trek.

    "We know we're eventually going to Mars, and there are multiple destinations between here and Mars," Dan Dumbacher, NASA's deputy associate administrator for exploration systems, said in a briefing that did not address the private Mars project.

    To do that, NASA is developing the new Orion deep-space capsule, the agency's first manned spacecraft since the space shuttle program ended in 2011. Orion is expected to launch on a new mega-rocket, the Space Launch System (SLS). [See Photos of NASA's Deep-Space Vehicles]

    Project Orion
    Orion and the SLS form the core of NASA's deep-space exploration program. In 2010, President Barack Obama set a lofty goal for NASA's future — send astronauts to an asteroid by 2025, then take aim at a manned Mars mission in the 2030s.

    The aerospace company Lockheed Martin is building the four-person Orion capsule for NASA, with the European Space Agency providing the service module for the spacecraft. Orion's first test flight, called Exploration Flight Test 1, is slated to launch in 2014, and parts of the space capsule are being assembled at the Kennedy Space Center now.

    Once the computers are in place sometime this summer, NASA scientists will power on the test capsule for the first time and check its systems on the ground, Orion project manager Mark Geyer said.

    The NASA team plans to launch the capsule atop a Delta 4 rocket, sending it 3,000 miles (4,828 km) above Earth's surface. The main goal is to test the heat shields tasked with protecting crew members during Orion's manned missions, the first of which is slated to launch toward lunar space in 2021.

    Giant rocket test
    NASA's first SLS flight — the unmanned Exploration Mission 1 — is due to launch in 2017, officials said.

    Currently, various components of the rocket are being built around the country. Starting in 2016, hardware is expected to begin arriving at the Kennedy Space Center for testing and assembly.

    Orion and the Space Launch System won't launch together at first, but data from both flight tests will be used to help NASA scientists learn what improvements may be needed for each of the vehicles to boost safety and efficiency, project officials said.

    "You want to make sure you've flown in that environment before you put anyone on board," Geyer said.

    Scientists will also test Orion's launch abort system during a separate test after the 2014 launch. Like NASA's Mercury, Gemini and Apollo capsules, the Orion spacecraft features an abort system designed to separate the capsule from its rocket during an emergency to carry its crew to safety. The agency's space shuttles had no such system.

    During the launch abort test, NASA plans to stress the Orion capsule to its limits to replicate the conditions astronauts might experience in the case of a malfunction. The spacecraft will be ripped free of its booster and propelled 1 mile (1.6 km) away to safety through a series of intricate maneuvers performed by its abort system.

    NASA is also preparing the ground facilities at Kennedy Space Center for the future missions. The Orion test flight will be run from a new firing room at the Launch Control Center, and NASA officials will be awarding a contract to a company that will reconfigure some of the structural models on the ground for the new rocket,  explained Pepper Phillips, NASA's ground systems project manager.

    Follow Miriam Kramer on Twitter @mirikramer or Space.com @Spacedotcom. We're also on Facebook and Google+

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • It's a 'go' for SpaceX launch to space station

    NASA / Kim Shiflett

    This Dragon spacecraft will launch on the upcoming SpaceX CRS-2 mission. The flight will be the second commercial resupply mission to the International Space Station by SpaceX.

    By Miriam Kramer
    Space.com

    CAPE CANAVERAL, Fla. — The weather looks promising for the planned Friday launch of a privately built robotic space capsule to the International Space Station, NASA says.

    The unmanned Dragon space capsule, built by the private spaceflight company SpaceX of Hawthorne, Calif., is slated to launch toward the space station Friday at 10:10 a.m. EST. Weather forecasts predict a 80 percent chance of favorable conditions for launch. NASA and SpaceX officials gave the scheduled mission a final "go" for launch earlier Thursday.

    "The mission is the second of 12 SpaceX flights contracted by NASA to resupply the International Space Station," NASA officials said in a mission update. "It will mark the third trip by a Dragon capsule to the orbiting laboratory, following a demonstration flight in May 2012 and the first resupply mission in October 2012."

    SpaceX has a $1.6 billion contract with NASA to provide 12 unmanned cargo deliveries to the space station. Another company, Orbital Sciences Corp. based in Virginia, has a $1.9 billion contract for eight mission using its own Antares rocket and Cygnus spacecraft.

    The Dragon spacecraft is expected to deliver 1,200 pounds  (544 kilograms) worth of supplies to the six international crew members on board the station. The capsule is scheduled to return to Earth with 2,300 pounds (1,043 kg) of material from the space station when it splashes down in the Pacific Ocean off the coast of Baja California on March 25.

    SpaceX

    On Monday, Falcon 9 and Dragon underwent a successful static fire in preparation for launch to the International Space Station. Engineers ran through all countdown processes as if it were launch day, ending with all nine engines on the rocket firing for nearly two seconds.

    SpaceX conducted a successful rocket engine test, known as a "static test fire" on Monday. The rocket's 9 Merlin engines were fired for a few seconds while the rocket was held down on the launch pad.

    NASA is relying on SpaceX, Orbital Sciences and other private companies to develop new private spacecraft to supply the International Space Station with cargo and ultimately ferry American astronauts into and from low-Earth orbit.

    With the retirement of the space shuttle fleet in 2011, NASA has been dependent on Russia's Soyuz spacecraft to fly astronauts to the space station, and use unmanned cargo ships built by Russia, Japan and Europe to deliver supplies to the orbiting laboratory.

    The space agency also is developing a new rocket and spacecraft, the Orion space capsule and its Space Launch System mega-rocket, for future deep-space exploration missions to the moon, asteroids and Mars.

    You can follow Space.com staff writer Miriam Kramer on Twitter @mirikramer. Follow Space.com on Twitter @Spacedotcom. We're also on Facebook and Google+.

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Magma once covered Mercury, study finds

    NASA / Johns Hopkins University Applied Physics Laboratory / Carnegie Institution of Washington

    Scientists use images from NASA's Messenger spacecraft to create these global views of Mercury, the most complete maps ever. These images were released on Feb. 22.

    By Clara Moskowitz
    Space.com

    The rocky, mostly dry surface of the planet Mercury may once have been roiling with hot magma, a new study based on observations by NASA's Messenger spacecraft suggests.

    NASA's Messenger, the first Mercury orbiter, has made its home around the closest planet to the sun since March 2011. From its close-up perch, the probe identified two distinct types of rocks that compose the planet's surface, which scientists were at a loss to explain.

    Now, experiments in a lab at MIT suggest Mercury's puzzling surface makeup is most likely explained by a huge ocean of magma that existed shortly after the planet formed about 4.5 billion years ago. 

    "The thing that's really amazing on Mercury is, this didn't happen yesterday," Timothy Grove, a professor of geology at MIT, said in a statement. "The crust is probably more than 4 billion years old, so this magma ocean is a really ancient feature."

    Messenger identified the two rock types using its X-ray spectrometer, which was able to distinguish the chemical composition of materials on the planet's surface. [Latest Photos of Mercury from NASA's Messenger]

    Scientists made synthetic rocks in the lab to simulate the two types of material, using finely powdered chemicals to piece together the closest possible matches to what was seen on the planet.

    "We just mix these together in the right proportions and we've got a synthetic copy of what's on the surface of Mercury," Grove said.

    The researchers then subjected these samples to high temperatures and pressures to re-create the conditions they might have experienced throughout Mercury's evolution.

    The analysis pointed to only one possible origin for the two rock types, the researchers said. An early ocean of magma created two layers of crystals, which eventually solidified and then re-melted into magma that was spread onto the surface of Mercury through volcanic eruptions.

    The findings help piece together a more complete history for the solar system's tiniest planet.

    "We're gradually filling in more blanks, and the story may well change, but this work sets up a framework for thinking about new data," said Larry Nittler, a researcher at the Carnegie Institution of Washington. Nittler led the team that originally identified the two rock types on Mercury, but was not involved in the MIT laboratory study. "It's a very important first step toward going from exciting data to real understanding."

    The scientists detailed their findings in the Feb. 1 issue of the journal Earth and Planetary Science Letters.

    NASA's Messenger spacecraft (the name is short for MErcury Surface, Space ENvironment, GEochemistry, and Ranging) launched in 2004 on a $446 million mission to study Mercury like never before. The spacecraft completed its primary mission in 2011 and is nearing the end of its first one-year mission extension. 

    Follow Clara Moskowitz on Twitter @ClaraMoskowitz or Space.com @Spacedotcom. We're also on Facebook and Google+

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • How King Richard the Lionheart's heart was preserved

    Philippe Charlier

    The dusty remains of Richard I's heart now rest in this crystal box.

    By Stephanie Pappas
    LiveScience

    The heart of Richard the Lionheart was preserved with mercury, mint and frankincense, among other sweet-smelling plants, a new study finds.

    The study is the first biochemical look at the heart of Richard I, who died in 1199. As was common practice at the time, the king's heartwas removed and mummified separately from the rest of his body. It rested in a reliquary at Notre Dame in Rouen for centuries before its rediscovery in 1838.

    Now, for the first time, the chemical composition of the substances used to preserve the heart has been revealed. These substances were directly inspired by biblical texts, said study leader Philippe Charlier of University Hospital R. Poincaré.

    "The aim was to approach the odor of sanctity," Charlier told LiveScience.

    The life and death of Richard I
    Richard I of England began his rule in 1189. He spent two years in captivity in Europe, much of that time being held for ransom by the Holy Roman Emperor. Later, the tale of Richard I's ransom would be folded into folk tales about Robin Hood, casting Richard I as a benevolent absent monarch and his brother John as a tax-happy usurper.

    (Richard I came centuries before Richard III, the English monarch whose bones were discovered in a Leicester parking lot in September 2012. Richard III died in 1485.)

    Musée départemental des Antiquités (c) Yohann Deslandes/CG76

    The box that contained Richard the Lionheart's preserved heart. Translated, the inscription reads "Here is the heart of Richard, King of England."

    On March 25, 1199, years after the kidnapping, Richard sustained a crossbow wound in Chalus, France, and died 12 days later of gangrene. His abdominal organs were removed and interred in Chalus, while his body went to rest at Fontevraud Abbey in France. His heart was embalmed and placed in its own casket and taken to Notre Dame in Rouen. [The 10 Weirdest Ways We Deal With the Dead]

    This division of the body was used to symbolize and mark Richard I's territory, Charlier said. However, no ancient texts remain to record how the embalming process was done.

    The heart rested in Rouen until July 1838, when a local historian discovered a lead box inscribed, "Here is the heart of Richard, King of England." The heart itself had been reduced to dust in the preceding centuries; all that the box contained was a brownish-white powder.

    Spiritual and practical
    It was this powder that Charlier and his colleagues tested. They found a variety of compounds, including traces of the proteins found in human heart muscle. They also observed tiny fragments of linen, suggesting that the heart was wrapped before placement in the box.

    Some metal compounds, including lead and tin, likely seeped into the powder from the lead box. Others were probably used in the embalming process. In particular, the researchers detected mercury, which has been found in other medieval burials and was probably used as an embalming agent.

    The analysis also turned up pollen from a variety of plants: myrtle, daisy, mint, pine, oak, poplar, plantain and bellflower. Some of these, including poplar and bellflower, would have been blooming in April when Richard the Lionheart died; their pollen may have simply settled out of the air into the casket.

    Other plants were probably used to preserve the heart. Myrtle, daisy and mint would not have been in bloom at the time, the researchers found, and probably would have been part of the embalming process. Frankincense, a tree resin, would also have been useful for both its preservation and its symbolic properties.

    "This symbolic substance appeared at both extremities of the Christ life," the researchers wrote online Thursday in the journal Scientific Reports. "Presented by the Biblical Magi at His birth, and used during His external embalming after the Passion."

    Preserving the heart would have been important, because the journey to Rouen from Chalus was about 330 miles (530 kilometers), the researchers wrote. But Richard I's contemporaries may have also seen the process as one of "theological transformation," Charlier said.

    Indeed, contemporary wisdom seems to have held that Richard I needed all the spiritual help he could get. In the 1200s, the bishop of Rochester announced that the king had only made it to heaven in 1232, having spent the intervening 33 years in purgatory, repenting his Earthly sins.

    Follow Stephanie Pappas on Twitter @sipappas or LiveScience @livescience. We're also on Facebook and Google+.

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Two rats, thousands of miles apart, cooperate telepathically via brain implant

    Nicolelis lab / Duke University

    If you're a lab rat, life is full of choices.

    Two rats — one in North Carolina, the other in Brazil — worked together on a task by communicating telepathically, thanks to implants in their brain.

    Electrical signals from a "leader" rat’s brain were collected, encoded and then zapped into the "follower" rat’s cortex in the form of an electrical signal. The follower rat then pressed one of two levers based on a light visible only to the leader rat. The Duke University experiment is the first time two animals have collaborated through such an artificial link, and shows that the mammal brain can be trained to act on electrical signals from another animal. 

    Miguel Nicolelis, the Duke neuroscientist who led the team from Duke and the International Institute for Neuroscience of Natal in Brazil, believes that information transfer could extend to other senses, too. “You could think about taste, vision — I don’t see any problem doing this,” he told NBC News.

    He says his wired rat duo show that the linking of mammalian brains is possible, but why stop at just two? "I could see a swarm of rats be informed by one rat," he says, "Most of them driving to the source based on information from another individual," a concept he calls a "Brain Net."

    Nicolelis and crew published their findings in Scientific Reports Thursday. 

    “I still think it's wild that he made it possible,” Ron Frostig, a neurobiologist at the University of Irvine who was not involved with the experiments told NBC News. 

    This experiment is in many ways extension of brain-machine tech that has been on slow boil at the Nicolelis lab for over a decade. Earlier in February, the Nicolelis lab showed that rats could be trained to act on infrared cues. Rats, like people, can’t naturally sense infrared light — an infrared sensor activated a implant in the rats' brains. Eventually they learned to follow that signal, approached the right hole, and received a reward.

    In the latest "mind-reading" experiment, both lead and follow rats went through a series of training phases. The leader rat was trained to use a lit light bulb to choose which of two levers to press. The second rat was trained to receive and act on gentle zaps of electrical stimulation in its brain. Once the two were wired up together, the second rat received signals from the leader rat's brain indicating which lever to choose. When the follower pressed the right lever, it was rewarded with water, and the leader was rewarded as well.

    The leader rat eventually figured out that the clearer he was with his “instructions,” the better his chances of getting a double reward. Frostig pointed out that this training was crucial to the success of this series of demonstrations. 

    While the link between the rats seems telepathic to casual observer, the rats don't necessarily know the other exists, Nicolelis explains. The follower rat feels a tingle in its brain and discovers that interpreting it one way rather than another leads to a reward. Marshall Shuler — a neuroscientist at Johns Hopkins University who was Nicolelis’ student in the late 1990s — describes it as a "special and powerful case of conditioning." "What's unique about this is that one animal is getting information that has nothing to do with it environment," he told NBC News.  

    How about human telepathy?
    The researchers are years away from testing this kind of electronic telepathy in people. Still, based on what is known about how people respond to brain stimulation and implants, Shuler says we might be better than the rats at interpreting intracranial cues.

    "I would think that humans would be able to exploit this information even more efficiently," Shuler says. 

    Nicolelis says they are “perfecting the experiment” in monkeys, training them to collaborate in a virtual game. In the past, the Nicolelis lab has trained brain-implanted monkeys to control a cursor on a screen using only their thoughts. In another computer game, a monkey pawed at virtual discs of different simulated textures, and was trained to pick one texture over the other, demonstrating one way information about touch could be fed back into the brain.

    Shuler says that this line of research isn't just about person-to-person telepathy, but may very well help computers talk back to human brains. “We’re quite comfortable with patterns arising from our own sensory mechanisms,” he explained, “What’s less intuitive to us is that, as experimentalists and engineers impose artificial patterns, the brain is able to render that information useful.”

    Take the field of prosthetics, a zone the Nicolelis lab is at home in. Ultimately, Shuler says, the goal is to get prosthetics to send touch data back to the user. A number of labs have shown that the brain or residual nerves can move a prosthetic limb. What many of those smart body parts lack is a way of relaying sophisticated feedback back to the brain. The Nicolelis lab may well provide the answer. 

    Related posts: 

  • Genetic tricks used on ancient texts to estimate age of Homer's 'Iliad'

    Biblioteca Ambrosiana via LGPN

    This codex of Homer's "Iliad" was produced in the late fifth century or early sixth century.

    By Joel N. Shurkin
    Inside Science News Service

    Scientists who decode the genetic history of humans by tracking how genes mutate have applied the same technique to one of the Western world's most ancient and celebrated texts to uncover the date it was first written.

    The text is Homer's "Iliad," and Homer — if there was such a person — probably wrote it in 762 B.C., give or take 50 years, the researchers found. The "Iliad" tells the story of the Trojan War — if there was such a war — with Greeks battling Trojans.

    The researchers accept the received orthodoxy that a war happened and someone named Homer wrote about it, said Mark Pagel, an evolutionary theorist at the University of Reading in England. His collaborators include Eric Altschuler, a geneticist at the University of Medicine and Dentistry of New Jersey, in Newark, and Andreea S. Calude, a linguist also at Reading and the Santa Fe Institute in New Mexico. They worked from the standard text of the epic poem.

    The date they came up with fits the time most scholars think the "Iliad" was compiled, so the paper, published in the journal Bioessays, won't have classicists in a snit. The study mostly affirms what they have been saying, that it was written around the eighth century B.C.

    That geneticists got into such a project should be no surprise, Pagel said.

    "Languages behave just extraordinarily like genes," Pagel said. "It is directly analogous. We tried to document the regularities in linguistic evolution and study Homer's vocabulary as a way of seeing if language evolves the way we think it does. If so, then we should be able to find a date for Homer."

    Who was Homer?
    It is unlikely there ever was one individual man named Homer who wrote the "Iliad." Brian Rose, professor of classical studies and curator of the Mediterranean section at the University of Pennsylvania Museum, said it is clear the "Iliad" is a compilation of oral tradition going back to the 13th century B.C.

    "It's an amalgam of lots of stories that seemed focused on conflicts in one particular area of northwestern Turkey," Rose said.

    The story of the "Iliad" is well-known, full of characters such as Helen of Troy, Achilles, Paris, Agamemnon and a slew of gods and goddesses behaving badly. It recounts how a gigantic fleet of Greek ships sailed across the "wine dark sea" to besiege Troy and regain a stolen wife. Its sequel is Homer's "Odyssey."

    Classicists and archaeologists are fairly certain Troy existed and generally know where it is. In the 19th century, the German archaeologist Heinrich Schliemann and the Englishman Frank Calvert excavated what is known as the Citadel of Troy and found evidence of a military conflict in the 12th century B.C., including arrows and a thick layer of burned debris around a buried fortress. Rose said it's not known whether the conflict was a civil war or a struggle between Troy and a foreign foe.

    The compilation we know as the "Iliad" was written centuries later, around the date Pagel is proposing.

    Decoding the words
    The scientists tracked the words in the "Iliad" the way they would track genes in a genome.

    The researchers employed a linguistic tool called the Swadesh word list, put together in the 1940s and 1950s by American linguist Morris Swadesh. The list contains approximately 200 concepts that have words apparently in every language and every culture, Pagel said. These are usually words for body parts, colors, necessary relationships like "father" and "mother."

    They looked for Swadesh words in the "Iliad" and found 173 of them. Then they measured how they changed.

    They took the language of the Hittites, a people that existed during the time the war may have been fought, and modern Greek, and traced the changes in the words from Hittite to Homeric to modern. It is precisely how they measure the genetic history of humans, by going back and seeing how and when genes alter over time.

    For example, they looked at cognates, words derived from ancestral words. There is "water" in English, "wasser" in German, "vatten" in Swedish, all cognates emanating from "wator" in proto-German. There are occasionally different types of linguistic mutations: For example, the Old English "hund" later became "hound," but eventually was replaced by "dog," which is not a cognate.

    "I'm an evolutionary theorist," Pagel said. "I study language because it's such a remarkable culturally transmitted replicator. It replicates with a fidelity that's just astonishing."

    By documenting the regularity of the linguistic mutations, Pagel and the others have given a timeline to the story of Helen and the men who died for her — genetics meets the classics.

    More Homeric history:


    Joel Shurkin is a freelance writer based in Baltimore. He is the author of nine books on science and the history of science, and has taught science journalism at Stanford University, the University of California at Santa Cruz and the University of Alaska at Fairbanks.

    This report was published by Inside Science News Service as "Geneticists Estimate Publication Date of the 'Iliad' on Feb. 26. Copyright 2013 American Institute of Physics. Reprinted with permission.

  • Black hole's super-fast spin revealed

    NASA / JPL-Caltech

    This artist's concept illustrates a supermassive black hole with millions to billions times the mass of our sun.

    By Mike Wall
    Space.com

    Astronomers have made the first reliable measurement of a supermassive black hole's spin, showcasing a technique that could help unravel the mysteries of these monsters' growth and evolution.

    The enormous black hole at the center of the spiral galaxy NGC 1365 is spinning about 84 percent as fast as Einstein's general theory of relativity allows it to, researchers determined. The find demonstrates that at least some supermassive black holes are rotating rapidly — a claim previous studies had hinted at but failed to confirm.

    "It's the first time that we can really say that black holes are spinning," study co-author Fiona Harrison, of Caltech in Pasadena, told Space.com. "The promise that this holds for being able to understand how black holes grow is, I think, the major implication." 


    X-ray light
    Supermassive black holes are almost incomprehensibly huge, with some containing 10 billion or more times the mass of our sun. Scientists think one lurks at the heart of most, if not all, galaxies. [Gallery: Black Holes of the Universe]

    NGC 1365, located about 56 million light-years from Earth in the constellation Fornax, does indeed harbor a gigantic black hole — one as massive as several million suns. And this behemoth is blasting out enormous quantities of energy as it gobbles up gas and other nearby matter, making it an intriguing target for astronomers.

    In the new study, researchers analyzed data from two X-ray space telescopes — the European Space Agency's XMM-Newton observatory and NASA's Nuclear Spectroscopic Telescope Array, or NuSTAR. The telescopes observed NGC 1365 in July 2012.

    By zeroing in on the high-energy light emitted by iron atoms, the telescopes were able to trace the motion of the flat, rotating accretion disk that circles NGC 1365's black hole and funnels gas and dust into its greedy maw.

    Astronomers found that the emissions were strongly distorted, suggesting that the inner edge of the accretion disk may be quite close to the black hole — close enough for gravitational effects to wreak havoc with the X-rays streaming from the disk. This in turn implied a rapidly rotating black hole, since general relativity states that the faster a black hole is spinning, the closer its disk can come to it, Harrison said.

    That's one interpretation. In the past, some astronomers have put forward a different interpretation of the readings. They suggested that such distortion, which has been observed in accretion disk emissions before, could be caused by clouds of gas that hang between a supermassive black hole and the telescopes observing it. [The Strangest Black Holes in the Universe

    "This has been a big controversy — which of the two is going on?" Harrison said. 

    How fast a super-massive black hole spins may indicate what it fed on and how often. NASA's NuSTAR X-Ray Telescope is helping to decode the early life story of a nearby active galaxy by timing its rotation and measuring its glow.

    NASA / JPL-Caltech

    This graphic shows two models for the spin of a black hole. Observations from NASA's NuSTAR probe revealed that the prograde rotation model applied in the case of NGC 1365's black hole - and that suggests that the black hole is spinning at an incredibly fast rate.

    Pinning down the spin
    The observations from the $165 million NuSTAR telescope, which launched in June 2012, cracked the case.

    Using NuSTAR's super-sensitive measurements of high-energy X-rays, the astronomers calculated that if there were gas clouds in the way, they would have to be incredibly thick to produce the observed distortion levels. In fact, they'd have to be so thick as to make the whole idea untenable, at least in the case of NGC 1365's black hole.

    "To shine through these thick clouds, the black hole would have to be so bright it would basically blow itself apart," said Harrison, who is the principal investigator for the NuSTAR mission. "So what has to be happening is, what we're seeing is these relativistic distortions. And that means that the disk is coming close to the black hole, which means the black hole must be spinning rapidly."

    The research team, led by Guido Risaliti of the Harvard-Smithsonian Center for Astrophysics and the Italian National Institute for Astrophysics' Arcetri Observatory, calculated this rotation rate to be 84 percent of that allowed by general relativity.

    It's tough to comprehend this figure, since it doesn't translate well into miles per hour. One estimate puts the speed at 670 million mph, or 1.08 billion kilometers per hour. In any case, it's safe to say that the black hole is spinning incredibly fast.

    "The analogy of an actual velocity is not quite right," Harrison said. "But what you can say is that spinning black holes twist space-time around them. And if you were standing near the black hole, basically your space-time would be twisted, or dragged, around such that you would have to rotate once every four minutes just to be standing still."

    The new study was published online Wednesday in the journal Nature.

    How a black hole grows
    Astronomers think that supermassive black holes acquire most of their spin as they grow, rather than being born with it. So studying their rotation rates can yield insights into how these monsters have evolved over time.

    The superfast spin of NGC 1365's black hole, for example, implies that it did not grow via numerous small black-hole mergers, Harrison said, since the odds are very low that many such chaotic events would spin it up in the same direction. Rather, it's more likely that NGC 1365's central black hole acquired its spin from one major merger, or simply by gobbling material from an accretion disk that has remained stable over the long haul.

    The new study represents a first step toward a better understanding of the nature and evolution of supermassive black holes, Harrison said.

    "We will make more measurements like this," she said. "Eventually what you'd like to do is have a bigger telescope that can actually measure more distant black holes so we can, using the statistics of the sample, understand how they grow over cosmic time." 

    Follow Space.com senior writer Mike Wall on Twitter @michaeldwall or Space.com @Spacedotcom. We're also on Facebook and Google+.

    © 2013 Space.com. All rights reserved. More from Space.com.

  • Those nut-cracking monkeys -- they use tools with finesse

    Barth Wright

    A bearded capuchin monkey uses a rock to crack open a nut placed on an "anvil."

    By Stephanie Pappas
    LiveScience

    Nut-cracking monkeys don't just use tools. They use tools with skill.

    That's the conclusion of a new study that finds similar tool-use strategies between humans and Brazil's bearded capuchin monkeys, which use rocks to smash nuts for snacks. Both monkeys and humans given the nut-smashing task take the time to place the nuts in their most stable position on a stone or log "anvil," the study found, keeping the tasty morsels from rolling away.

    That means the monkeys are able to not only use tools, but to use them with finesse. This ability may be a precursor to humans' ability to adapt tools to different circumstances and to use them smoothly under varying conditions.


    "Any one individual can accommodate stones of different sizes, anvils of different angles and material and nuts of different shapes and sizes," said study leader Dorothy Fragaszy, a primate researcher at the University of Georgia, adding, "In fact, some of these nuts people can't crack."

    Nut-crackers
    Bearded capuchin monkeys were the first non-ape primates to be discovered using tools in the wild. They crack tough nuts by placing them on pitted boulders or logs and then hitting them hard with other large rocks. [8 Humanlike Behaviors of Primates]

    Barth Wright

    Bearded capuchin monkeys place nuts in their most stable positions before cracking them.

    "They are slamming (the rock) on that nut," Fragaszy told LiveScience. "It's very impressive when you see it."

    Fragaszy and her colleagues wanted to get a better idea of how skilled capuchins are at nut-cracking. In particular, they noticed the monkeys have an odd habit of tapping the nuts multiple times against the pits in a log before putting them down. Perhaps, they thought, the tapping was a way to tell how stable the nut might be.

    To find out, the researchers brought palm nuts to a population of capuchin monkeys in Fazenda Boa Vista in Brazil. The monkeys are wild, but habituated to human presence. Ten of the monkeys "volunteered" for the study by gathering the nuts and cracking them with stones as big as their heads as the researchers videotaped.

    Before handing over the nuts, however, the scientists rolled them along the floor to find their flat sides, which they marked with a line. They also marked the other axis of the nut with color-coded pens so they could identify how the monkeys placed the nuts in the video.

    Savvy tool use
    The results revealed that the monkeys consistently placed the nuts in the most stable position. Out of 302 nut-cracking attempts, 253 started with the line marking the nut's stable axis facing up. Monkeys varied only slightly in their ability to ideally place the nut, doing so between 71 percent and 94 percent of the time depending on the individual. [See Video of the Monkey Attempts]

    Next, the researchers ran an identical test with humans. Seven male and seven female volunteers were given nuts and told to crack them with stones, just as the capuchin monkeys do. The humans were blindfolded during the task, because the researchers suspected that the monkeys could place the nuts by feel and wanted to find out if humans could, too.

    On average, the humans also placed the nuts in the most stable position, doing so on about 71 percent of tries. Unlike capuchins, however, they didn't knock the nuts against the sides of the pit very frequently. Instead, humans tended to roll the nuts around in their hands, feeling their shape. Humans have much larger hands than bearded capuchins, the researchers wrote Wednesday in the journal PLOS ONE, which could explain the different strategies.

    The results suggest that humans and monkeys share the ability to use tools skillfully, with minimal effort for maximum effect, the researchers wrote.

    "It's skill in the way that we use that word to talk about human skills," Fragaszy said. "It's a goal-directed activity. It's done fluidly. It's done flexibly."

    Correction for 2:10 p.m. ET Feb. 28: An earlier version of this story, including a photo caption, implied that the monkeys used only stones as their anvils. A log anvil can be used as well, and that's what the researchers used for their experiment.

    Follow Stephanie Pappas on Twitter @sipappas or LiveScience @livescience. We're also on Facebook and Google+.

    Copyright 2013 LiveScience, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed. 

    This story was originally published on

  • NASA would take a hit with sequestration

    NASA / Kim Shiflett

    The Space Exploration Technologies, or SpaceX, Dragon spacecraft with solar array fairings attached, stands inside a processing hangar at Cape Canaveral Air Force Station, Fla. Sequestration could put SpaceX launches at risk.

    By Dan Leone
    Space.com

    WASHINGTON — To deal with the nearly $900 million budget hit NASA will absorb if automatic spending cuts known as sequestration are allowed to take effect March 1, the U.S. space agency would slow development work on commercially operated astronaut taxis, delay or cancel space technology programs and postpone the launch of some small science missions.

    NASA Administrator Charles Bolden outlined the space agency’s sequestration plans in a Feb. 5 letter to Senate Appropriations Committee Chairwoman Barbara Mikulski, D-Md., who released it following a Feb. 14 hearing.

    NASA’s overall budget would drop to $16.9 billion, down from the $17.8 billion Congress approved last year.

    Spending on the commercial crew program NASA is using to subsidize development by Boeing, Space Exploration Technologies (SpaceX) and Sierra Nevada of competing human spaceflight systems would be reduced to $388 million — $18 million less than it is currently spending and $441.6 million less than the agency had been planning to spend in 2013. [What NASA's 2013 Budget Pays For (Video)]

    NASA, like all federal agencies, has had its funding frozen at 2012 levels under a stopgap spending measure known as a continuing resolution that expires March 28. NASA’s sequestration plan assumes that the continuing resolution will be extended through Sept. 30, the end of the U.S. government’s 2013 fiscal year.

    Bolden said NASA’s commercial crew partners would feel a funding pinch as soon as July.

    Among the commercial crew activities planned for later this year that NASA would not be able to fund after sequestration are:

    • A July test of Boeing’s CST-100 orbital maneuvering and attitude control engine.
    • A September review of an in-flight abort test SpaceX plans to conduct in April 2014.
    • An October integrated system and safety analysis review of Sierra Nevada’s DreamChaser space plane.

    "Overall availability of commercial crew transportation services would be significantly delayed, thereby extending our reliance on foreign providers for crew transportation to the International Space Station," Bolden wrote.

    Meanwhile, a sequester would also put the screws to NASA’s Space Technology Program, a White House priority under President Barack Obama. Instead of getting the $699 million sought for the program, NASA would cut its budget back to $550 million, or about $24 million less than it has now.

    To absorb the cut, NASA would consider canceling programs now in the development stage, including a highly publicized demonstration of a deep-space atomic clock, which was set to fly as a hosted payload on an Iridium Next satellite scheduled for launch in 2015. Four other space technology programs could also wind up on the chopping block, Bolden warned, and nine others might be delayed.

    Small astrophysics and Earth science missions would also suffer under NASA’s plan to reduce the Science Mission Directorate’s budget to $4.86 billion. While that is only $51.1 million less than Science would have received under the agency's 2013 budget request, it is $200 million less than the mission directorate has today.

    To absorb the cut, NASA intends to award 5 percent fewer research grants this year and reduce funding for new Explorer- and Earth Venture-class missions by 10 to 15 percent. Bolden said this would result “in lower funding levels for new activities and causing minor launch delays.”

    The next missions scheduled for launch in NASA’s Explorer line of small astrophysics missions are the Interface Region Imaging Spectrograph, an ultraviolet observatory slated for an April launch, and Astro-H, an X-ray observatory scheduled to launch in February 2014.

    The next Earth Venture launch on NASA’s calendar is the Orbiting Carbon Observatory-2, which is supposed to lift off in July 2014.

    This story was provided by Space News, dedicated to covering all aspects of the space industry.

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

  • Push for Pluto mission postage stamp gains ground

    NASA / SWRI / Durda

    Artist Dan Durda's concept for a U.S. postage stamp honoring the New Horizons mission to Pluto.

    By Robert Z. Pearlman
    Space.com

    The grassroots mission to land a Pluto-bound planetary probe on a postage stamp has caught the attention of postal authorities, the team that organized the campaign announced on Monday.

    "Recently, we were issued a letter from the (United States Postal Service) USPS informing us that the New Horizons mission stamp proposal will be submitted for review and consideration before their Advisory Committee!" wrote Con Tsang, a research scientist at the Southwest Research Institute in Colorado, in an e-mail addressed to supporters and posted on the NASA mission's Facebook page. "We have cleared the first hurdle!"

    Last February, Tsang began a petition on the Change.org website urging the USPS and its Citizens' Stamp Advisory Committee to honor the first mission to Pluto with its own postage stamp. Backed by the New Horizon's flight team, including the mission's principal investigator Alan Stern, the petition collected more than 12,000 signatures by the time the effort ended on March 13, 2012.

    The campaign's conclusion was timed to coincide with the anniversary of the announcement of Pluto's discovery by American astronomer Clyde Tombaugh in 1930.

    NASA's New Horizons spacecraft was launched on Jan. 19, 2006 on a mission to flyby Pluto and its moons in July 2015. Seven years into the journey, the probe is now more than halfway between the orbits of Uranus and Neptune.

    As it turns out, the two and a half years that remain before New Horizons makes its closest approach to Pluto may be just enough time for the stamp advisory committee to make its decision. [New Horizons' Pluto Mission Explained (Video)]

    "This entire process can take up to 3 years," Tsang wrote about the stamp selection timeline. "So we will most likely not know if a stamp is approved until around the time when New Horizons reaches Pluto in 2015."

    The Citizen's Stamp Advisory Committee has overseen the choice of themes for U.S. postage stamps since 1967. The three year process is designed to give enough time for the committee to consider the proposal, as well as the design and production of the stamp should the subject be selected.

    Over the past four decades, the committee has chosen to recognize the nation's space program on more than three dozen stamps. One of those stamps, issued in 1991, had a depiction of Pluto with the words "Not Yet Explored." An example of that stamp is flying aboard New Horizons.

    Most recently, the USPS honored NASA's MESSENGER mission to the planet Mercury as part of a pair of stamps that also recognized the first American astronaut to fly in space, Alan Shepard.

    The New Horizons' petition asked the advisory committee to consider a stamp for the mission not just to honor the first Pluto flyby, but also the first exploration of the Kuiper Belt, the first exploration of an ice dwarf planet, and the farthest object ever explored in space.

    Follow collectSpace on Facebook and Twitter @collectSpace and editor Robert Pearlman @robertpearlman. Copyright 2012 collectSpace.com. All rights reserved.

    Copyright 2013 Space.com, a TechMediaNetwork company. All rights reserved. This material may not be published, broadcast, rewritten or redistributed.

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