As NPR's Jessica Yung reports, the evidence points to a complex evolutionary history of bipedalism. JESSICA YUNG, BYLINE: As you walk around, you might not think about how you walk or the footprints ...
The lake margin habitat offered food in the form of reeds, freshwater bivalves, fish, birds and reptiles such as turtles and crocodiles, though it could have been dangerous for bipedal primates 4 or 5 ...