Sleep might seem pretty simple, but scientists are still scratching their heads over questions surrounding the slumbering state. What does sleep mean to a whale, a brown bat, a migratory bird or even an invertebrate?
Ever since Teddy Roosevelt witnessed a piranha feeding frenzy, the fish have been known as fearsome predators. But can they really strip a cow to the bone? See more »
Coyotes and badgers? This unlikely partnership is actually a surefire thing when it comes to catching a tasty dinner. See more »