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Summary: Key Innovation In Human Evolution

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Summary: Key Innovation In Human Evolution
Key innovation in human evolution is the development of bipedalism and gradual increase in size of brains. The evolution might have occurred due to change in climate and environment which lead to reduction and replacement of trees with grasslands. Due to presence of large numbers of trees, it was easier for our ancestors to have quadrupedalism instead of bipedalism, so that they can climb on trees and move from one place to another. But with the decrease in number of trees, requirement for bipedalism increased. In an article by Wayman E. (2012), it has been mentioned that Lucy had the anatomy of bipead. Lucy belongs to Australopithecus afarensis. It is estimated that Lucy lived 3.2 mya. Her pelvis was broad and she has thigh bones which were
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