Archaeologica.org

Michael Cremo wrote:In 1979, researchers at the Laetoli, Tanzania, site in East Africa discovered footprints in volcanic ash deposits over 3.6 million years old. Mary Leakey and others said the prints were indistinguishable from those of modern humans. To these scientists, this meant only that the human ancestors of 3.6 million years ago had remarkably modern feet.

But according to other scientists, such as physical anthropologist R. H. Tuttle of the University of Chicago, fossil foot bones of the known australopithecines of 3.6 million years ago show they had feet that were distinctly apelike. Hence they were incompatible with the Laetoli prints. In an article in the March 1990 issue of Natural History, Tuttle confessed that "we are left with somewhat of a mystery." It seems permissible, therefore, to consider a possibility neither Tuttle nor Leakey mentioned—that creatures with anatomically modern human bodies to match their anatomically modern human feet existed some 3.6 million years ago in East Africa.

Australopithecus afarensis, an ancient hominid species best known for a partial female skeleton called Lucy, had stiff foot arches like those of people today, say anthropologist Carol Ward of the University of Missouri in Columbia and her colleagues. A bone from the fourth toe — the first such A. afarensis fossil unearthed — provides crucial evidence that bends in this species’ feet supported and cushioned a two-legged stride, the scientists report in the Feb. 11 Science.

“We now have the evidence we’ve been lacking that A. afarensis had fully developed, permanent arches in its feet,” Ward says. Survival for Lucy and her comrades must have hinged on abandoning trees for a ground-based lifestyle, she proposes.