bipedalism

Walking on two legs, or bipedalism, immediately sets us apart form other apes. It frees our arms for using tools and weapons and is a key part of our evolutionary success. Scientists have put forward a few theories to explain how our upright gait evolved, but the 'savannah theory' is by far the most prolific. It's nicely illustrated by this misleading image that has become a mainstay of popular culture. It suggests that our ancestors went from four legs to two via the four-legged knuckle-walking gait of gorillas and chimps. Dwindling forests eventually pushed them from knuckle-walking to a…

In 1978, a paleoanthropological team including Mary Leakey, Richard Hay, and Tim White made a startling discovery at Laetoli, Tanzania; in a bed of volcanic ash that would later be dated to about 3.5 million years old were the footprints of ancient hominids. The preserved trackway, found to contain the footprints of three individuals of the same species walking in the same direction during a very short period of time (possibly walking together as a group), would become one of the most important and iconic of hominid fossils, the fact that hominids were walking upright 3.5 million years ago…

Category: Anthropology As I mentioned just prior to my move to Sb, I spent this past Saturday at NYU at the "Evolutionary Anthropology at the Interface" conference, which was primarily a celebration of the work of Cliff Jolly. I'm still a bit over my head when it comes to knowing the full "Who's Who" of evolutionary anthropology, but I do know that Cliff Jolly is most well known for his "seed-eaters" hypothesis of human origins, in which extant baboons (Papio sp.) are proposed to be better primates to study when considering primate origins and a seed-eating diet is put forward as one of the…