Oldest Known Footprints in Grand Canyon Were Left by Mysterious, Sideways-Walking Reptile
Thursday, November 15, 2018 - 08:30
in Paleontology & Archaeology
About 315 million years ago — long before dinosaurs roamed the Earth — an early reptile scuttled along in a strangely sideways jaunt, leaving its tiny footprints embedded in the landscape, new research finds.