Plutonium Shortage Could Stall Space Exploration

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The moon is generally thought to be a dry place, and the discovery of water on its surface comes as an unexpected — and exciting — surprise for researchers. Carolina K. Smith/iStockphoto.com hide caption

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Surprise! Water Found On Moon's Surface

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This radar image taken by Cassini in July 2006 of Titan, one of Saturn's moons, provides convincing evidence that it is covered by large bodies of liquid. NASA/JPL/Space Science Institute hide caption

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Exploring A Moon By Boat

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This 'butterfly' nebula was captured with Hubble's newly updated imaging. NASA hide caption

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Souped-Up Hubble Makes A Comeback

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Space Panel: Exploration Requires Bigger Budget

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Both young infants and dogs sometimes ignore what they see with their own eyes and instead trust a human "teacher." Dogs may have evolved this trait to help them live with people. hide caption

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Babies And Dogs Make The Same Classic Mistake

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Inuit Hunters Help Scientists Track Narwhals

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Chasing After The Elusive Narwhal

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Expert Panel To Advise Obama On Spaceflight

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Charting NASA's Future: To The Moon And Beyond

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What Do Kids Think Of Another Moon Shot?

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Astronauts move the lunar camera onto a tripod on the moon. NASA hide caption

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Houston, We Erased The Apollo 11 Tapes

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