This Week: Holy horseradish! Ancient roots of pain
In the News: Earthquake safety: It begins at home
To hide from hungry fish, this animal houses luminous bacteria. But what prevents the bacteria from reproducing and killing the squid? At last, a genetic a balancing mechanism is revealed.
It’s one of the biggest puzzles of paleontology: Why did North America’s large mammals go extinct shortly after the glaciers melted about 15k years ago? New study suggests that hunters get the credit — or blame.