Instant Expert: The Science You Need to Know Now

Quick hits of wisdom in our annual guide to some of today’s hottest science.

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Nukes 101

More than 2,000 nukes could be fired on short notice.

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Alien Hunting

A planet’s atmosphere can reveal alien life.

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The Return of Swine Flu

Eighty percent of people hospitalized with swine flu in the U.S. were under 50.

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Dark Flow Revealed

Something outside our visible universe is moving whole galaxies.