Evolution of the human pelvis
By A Mystery Man Writer
Description
Brain size has a strong effect on human hip bones. The shape of human hip bones results from a compromise between walking on two legs and giving birth to large-brained babies.Humans need narrow hips to walk on two legs, but they also need wide hips to have babies with big brains. This problem is known as the obstetrical dilemma.
Figure 3 from The evolution of the human pelvis: changing
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