21. The newly discovered material probably troubles the established scenario about human evolution and especially evolution of bipedalism , 22. Subsequently, older " Ardipithecus ramidus " fossils were found with features that suggest bipedalism . 23. Analysis of the footprints and skeletal structure showed clear evidence that bipedalism preceded enlarged brains in hominins. 24. They concluded bipedalism was selected simply because it allowed for a further range of travel for hominids. 25. Time of origin of bipedalism may well be fifteen million years ago during the miocene ape radiation. 26. This environmental theory is used to extend the scope of our understanding of the appearance of bipedalism . 27. These tests basically remove any doubt that the origins of bipedalism go back well over four million years, 28. However, many anthropologists argue that these advantages were not large enough to cause the emergence of bipedalism . 29. Dart's savanna hypothesis suggested that bipedalism was caused by a move to the savanna for hunting. 30. Also, basicranial and postcranial remains indicate it may have had adaptations for a significant degree of bipedalism .
