"Carolina Butcher" Was a Massive Croc That Hunted on its Hind Legs

The fearsome "Carolina Butcher" isn't a legendary serial killer. It's a 9-foot-long ancestral crocodile that stomped about the southeastern U.S. during the Late Triassic, eating smaller armored reptiles and competing with dinosaurs for top-predator status. Oh, and it walked on its hind legs. » 3/19/15 6:00am 3/19/15 6:00am