The SpaceX Falcon 9, carrying a Dragon capsule, lifts off the launch pad at Launch Complex 40 at Cape Canaveral on Dec. 8, 2010. NASA hide caption

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NASA Prepares For Risks In Private Space Travel

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These primitive tools were found on the eastern edge of the Arabian Peninsula, outside the range of Neanderthals. Researchers say humans may have left Africa earlier than previously thought, crossing what is now the bottom of the Red Sea. Science/AAAS hide caption

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Tools Suggest Humans Left Africa Earlier Via Arabia

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A recent survey of microbiologists across the country documented 13 episodes of microbial destruction involving viral, bacterial and fungal strains. iStockphoto.com hide caption

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Curbs On Pathogens Pose Dilemma For Scientists

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It was Christiane Benson's diagnosis with juvenile Batten disease in 2008 that inspired her parents to start the Beyond Batten Disease Foundation and to develop the universal carrier screening test. Courtesy of Charlotte Benson hide caption

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New Genetic Test Screens Would-Be Parents

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A robotic sub found an underwater mountain range beneath Pine Island Glacier. British Antarctic Survey hide caption

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Sub Makes Unexpected Find Under Floating Ice Shelf

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An oiled white ibis lands on an island in Barataria Bay off the coast of Louisiana June 8. Charlie Riedel/AP hide caption

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Should Oiled Birds Be Cleaned?

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Six men will enter a fake interplanetary spaceship in Moscow, close the hatch, and then live inside it for more than 500 days. S. Corvaja/ESA hide caption

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Fake Mars Mission: 'Real World' Meets Space Travel

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Falcon 9 flight hardware goes through final integration at SpaceX's Cape Canaveral launch site in Florida. SpaceX hide caption

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Falcon 9: A Future Space Taxi?

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At Launch Pad 39A at NASA's Kennedy Space Center in Florida, a technician performs a final check of space shuttle Atlantis' payload bay doors before they are closed for launch. Cory Huston/NASA hide caption

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Space shuttle Atlantis awaits blastoff on its launch pad as members of the media set up remote cameras for Friday's scheduled launch from Kennedy Space Center in Florida to the International Space Station. Matt Stroshane/Getty Images hide caption

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The First Last Flight Of Space Shuttle Atlantis

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First Moonwalker Criticizes Obama's Space Plan

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In the study, people who washed their hands after making a tough choice seemed less worried about it. iStockphoto.com hide caption

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Stressful Decision? Washing Hands Could Help Soothe

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This illustration shows the asteroid 24 Themis flanked by two small fragments that broke off following a crash more than 1 billion years ago. The bottom fragment's cometlike tail comes from the sublimation of ice from its surface. Gabriel Perez, Servicio MultiMedia, Instituto de Astrofisica de Canarias, Tenerife, Spain hide caption

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Frosty Asteroid May Give Clues About Earth's Oceans

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This newly released image from Hubble shows scorching radiation and fast winds from super-hot newborn stars are shaping this pillar of gas and dust. This stellar nursery is called the Carina Nebula and located 7,500 light-years away. NASA hide caption

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