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Power switch: A nuclear future without uranium

In Superfuel, energy expert Richard Martin argues the case for thorium, an abundant and safe alternative to uranium that we cannot afford to overlook

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Evening Star's rare path across the sun

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Will technology bring out the best or worst in us?

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Why geeks should be invited to the policy party

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I am what I am, except when I am someone else

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American DNA holds some surprising secrets

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Why does time seem to pass faster as we get older?

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When did our ancestors learn to do the right thing?

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Heart drawn: Leonardo da Vinci's intricate anatomy

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Rock of all ages: From stardust to living planet

Mineralogist Robert M. Hazen's The Story of Earth is a gripping adventure from the birth of our planet to the complex life forms that exist today

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A species of picky eaters

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Street wise: Giant brains go on outdoor display

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The secrets of your body clock

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How to win a Nobel for someone else's work

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