What if we're all from Mars? AFP/Getty Images hide caption

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If Life Traveled From Mars To Earth On A Rock, Who Are We?

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Space Telescope Reawakened for an Asteroid Hunt

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Far Out: Voyager 1 Might Be Over The Edge, Into Deep Space

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A Telescope Fails, but the Hunt for Exoplanets Continues

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This may look like a mad scientist's garage sale, but it's actually the most precise clock ever built. Jim Burrus/NIST hide caption

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The World's Most Precise Clock Could Prove Einstein Wrong

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This artist rendering provided by NASA shows Voyager 1 at the edge of the solar system. AP hide caption

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Has Voyager 1 Left The Solar System?

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Mission to Mars: Six explorers lived in this simulated Mars habitat in Hawaii for four months, part of a NASA study to test the role of cooking and food on an extended space mission. Sian Proctor/NASA HI-SEAS hide caption

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An artist's illustration of Kepler-22b, a planet that circles its star in the "goldilocks" zone. Ames/JPL-Caltech/NASA/Getty Images hide caption

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Kepler Space Telescope Is Beyond Repair, NASA Says

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