Brave birds run around racetrack to teach us about dinosaurs

In a quest to learn how two-legged dinosaurs moved, scientists watched their descendants — birds — run around on a race track. After all, chickens were once carnivorous dinosaurs that stalked the Earth on giant drumsticks.For all the movies that show dinosaurs chasing after humans, we don’t actually know much about what a walking or running dinosaur looked like. Footprints and fossils, for example, can’t tell us whether a dino strode or strutted. “They’re sta