Stone-age 'likes': Eggshell beads exchanged over 30,000 years ago
Monday, March 9, 2020 - 22:10
in Paleontology & Archaeology
A clump of grass grows on an outcrop of shale 33,000 years ago. An ostrich pecks at the grass, and atoms taken up from the shale and into the grass become part of the eggshell the ostrich lays.