Nell Greenfieldboyce Nell Greenfieldboyce is a NPR science correspondent.
Nell Greenfieldboyce 2010
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Nell Greenfieldboyce

Earth-Like Planet Discovered in Libra

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Study: 634 Million People at Risk from Rising Seas

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NASA Report on Asteroids Suggests Nuclear Option

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Energy Concerns Push Clocks Forward this Weekend

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Spacecraft Model Points the Way to the Moon

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Cows Engineered for Immunity to Mad Cow Disease

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