Detecting fossils of human bones living on trees
American scientists have discovered fossil bones fossil of prehistoric Australopithecus afarensis living 3.9-1.9 million years ago. This person may be the direct ancestor ofWhen did people come from the tree to the ground?
From the fossil foot bones found, scientists have determined the time when our ancestors left the tree to step down to the ground with a vertical gait, which was about 3.2 million