Paleontological research has confirmed a series of recently discovered fossils tracks are the oldest recorded tracks of their kind to date within Grand Canyon National Park. In 2016, a geology professor was hiking with his students when he made a surprising discovery. Lying next to the trail, in plain view of the many hikers, was a boulder containing conspicuous fossil footprints.
Click here for original story, Cliff collapse reveals 313-million-year-old fossil footprints in Grand Canyon National Park
Source: ScienceDaily