Warwick Bayly has always been fascinated by horses. He’d go to races, not to place bets, but to watch them run. “It’s just ...

Free-ranging horses are impacting public lands, but in Arizona, as in many places across the West, people can't agree on how ...

Blue crabs, bluebirds, beetles and many more creatures can be spotted in and around the bay—and scientists at the Smithsonian ...

Scientists found the 500-million-year-old fossil of a "penis worm" in the Grand Canyon—and reconstructed how the creature would have used its strange mouth to feed.