Nature

Fair Chase

On the short-grass plains of eastern New Mexico, a band of elite marathon runners tests a controversial theory: Did the aerobic endurance of ancient man allow him to chase down the fastest ungulates...

The Pulse

The 4-Hour Body, spending time outside, ergonomic kettlebells, carrots and alpha-carotene.

Moments of Truth

Documentaries to watch for at 2011 Sundance Film Festival.

The Wild File

Q. What was up with that killer mountain goat in Olympic National Park?

The Killer in the Pool

Last February, when a 12,000-pound orca named Tilikum dragged his SeaWorld trainer into the pool and drowned her, it was the third time the big killer whale had been involved in a death. Many...