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Alien Intelligence

What is the search for extraterrestrial intelligence actually looking for?

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MAGAZINE HIGHLIGHTS

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Asteroid Impacts Shaped Earth's Earliest Life

Asteroids pummeled our planet during its first 2 billion years. But the consequences for life were not what you might expect.
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Testing Turing's Legacy

Decoding popular myth to discover what the mathematician and computer science pioneer really did — and didn’t — do.
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Capturing the First Interstellar Travelers

The Stardust mission has returned bits of old, dead stars to Earth. Probably.
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