Genetic Shifts and Bipedalism
Scientists have discovered that two tiny genetic shifts played a crucial role in enabling early humans to walk upright.
These genetic changes affected the development of the human pelvis, reshaping our ancestors' hips and laying the foundation for bipedalism.
- The first genetic change rotated the ilium, the bone that hands rest on when placed on the hips, by 90 degrees.
- This rotation reoriented the muscles attached to the pelvis, transforming a system for climbing and running on all fours into one for standing and walking on two legs.
Two small genetic changes reshaped the human pelvis, setting our early ancestors on the path to upright walking, scientists say.
Skeletons of humans and primates, such as gorillas, chimpanzees, orangutans, and gibbons, exhibit distinct differences in their pelvis structures, highlighting the significance of these genetic shifts.
Author's summary: Genetic shifts enabled humans to walk upright.
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