Fossil footprints show some crocodile ancestors walked on two legs
Puzzling nearby tracks were likely also made by a bipedal croc ancestor, not a giant pterosaur
![illustration of crocodile ancestors walking on two legs](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2020/06/061120_CG_bipedal_croc_feat.jpg?fit=1028%2C579&ssl=1)
About 106 million years ago, a large crocodile ancestor (shown here in an artist’s conception) walked on two legs in what is now South Korea, leaving behind a series of footprint impressions now preserved in the rock.
Anthony Romilio/The University of Queensland