One of the major early debates in paleoanthropology involved the timing of the developments of bipedalism and cranial expansion. Many scholars held fast to the idea that cranial capacity was the hallmark of human differentiation from other primates while others suggested that bipedal locomotion was the first definitive human characteristic. What evidence eventually proved that bipedalism preceded massive cranial expansion in our hominid ancestors? Why do you think there was a preference for seeing ourselves as the "brainy primate" rather than the twolegged primate? Finally, what were some of the advantages of bipedal locomotion that allowed us to eventually develop increased cranial capacity?