Support WBURAncient footprints mistakenly attributed to bears were made by early humansPlay03:33Download AudioNell GreenfieldboyceDecember 01, 2021 ShareOn the left is a nearly 3.7 million-year-old fossil footprint now believed to have been made by an early human. On the right is the rear footprint of a young black bear. (Left: J. DeSilva/Right: E. McNutt)
