how human became bipedal creature - evolution theory for busy people
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. But it was with Australopithecus, an early hominin who evolved in Southern and Eastern Africa between 4 and 2 million years ago, that our ancestors took their first steps as committed bipeds. Yet scientists still know little about the circumstances that led to this trait’s emergence