We're all pretty familiar with modern crocodiles and their low, four-legged stance. A set of mysterious fossilized footprints discovered in South Korea may rewrite what we know about the locomotion of some ancient cretaceous crocs.
An international team led by Kyung Soo Kim from Chinju National University of Education puzzled over the footprints, which appeared at first to be made by a pterosaur, a flying dinosaur that may have moved as a bipedal on land.
It's what was missing from the trackway that was so strange. There were no handprints or signs of tails dragging on the ground. The scientists looked closely to make sure the footprints hadn't just obscured possible handprints.
The researchers ruled out the pterosaur or bipedal dinosaur idea based on an analysis of the impressions. "Dinosaurs and their bird descendants walk on their toes. Crocodiles walk on the flat of their feet leaving clear heel impressions, like humans do," Kim said.