It’s all in the tail: New theory for why some dinosaurs evolved to stand on two feet
Scott Persons / CPA skeleton of the proto-dinosaur Marasuchus, is shown in this undated handout photo. The proto-dinosaur Marasuchus is a squirrel-sized carnivore that likely walked on all fours but ran on two legs. Paleontologists at the University of Alberta have a new theory for why some dinosaurs stood on two feet instead of four. EDMONTON — Paleontologists at the