http://en.wikipedia.org/wiki/Pelvis
The drying of the environment of East Africa in the period since the creation of the Red Sea and the African Rift Valley, saw open woodlands replace the previous closed canopy forest. The apes in this environment were compelled to travel from one clump of trees to another across open country. This led to a number of complementary changes to the human pelvis. It is suggested that bipedalism was the result.
The drying of the environment of East Africa in the period since the creation of the Red Sea and the African Rift Valley, saw open woodlands replace the previous closed canopy forest. The apes in this environment were compelled to travel from one clump of trees to another across open country. This led to a number of complementary changes to the human pelvis. It is suggested that bipedalism was the result.
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