Instant Expert: The Science You Need to Know Now
Quick hits of wisdom in our annual guide to some of today’s hottest science.

McKibillo

Nukes 101
More than 2,000 nukes could be fired on short notice.

Alien Hunting
A planet’s atmosphere can reveal alien life.

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

Dark Flow Revealed
Something outside our visible universe is moving whole galaxies.