Pelvic and hind-limb indicative of obligate bipedality.
Bipedality, the ability to walk upright on two legs, is a hallmark of human evolution.
Many primates can stand up and walk around for short periods of time, but only humans use this posture for their primary mode of locomotion. Fossils suggests that bipedality may have begun as early as 6 million years ago.
A new study provides support for the hypothesis that walking on two legs, or bipedalism, evolved because it used less energy than quadrupedal knucklewalking.
Humans walking on two legs only used one-quarter of the energy that chimpanzees who knuckle-walked on four legs did.
Learn more about bipedalism here:
