The death of Tim Russert is teaching us a lot about the mechanics of sudden heart attack. First, we're all right to be paranoid. There are roughly 1.2 million heart attacks a year in the U.S., over ...

For over 30 years, Terrie Williams has been studying exercise physiology in wild animals: African lions and wild dogs, dolphins and whales, coyotes and mountain lions, as well as a few human athletes.

It’s never a good moment for disaster to strike, but the timing of the Deepwater Horizon oil spill in the Gulf of Mexico was particularly unfortunate for one of the region’s most commercially valuable ...