Bipedalism is a mode of locomotion that involves the use of two legs to walk, run, or stand. It is a distinctive characteristic of hominids, a group of primates that includes humans and their ancestors. The emergence of bipedalism dates back around 4 million years and was a crucial adaptation for early hominids. This allowed them to move across open savannas and to forage for food in new environments. Bipedalism led to significant anatomical and physiological changes, including modifications in the pelvis, spine, and lower limbs. While there is still some debate about the evolutionary pressures that drove the emergence of bipedalism, it is considered a key milestone in human evolution.
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