Genetic Shifts and Human Bipedalism
Scientists have discovered two tiny genetic shifts that contributed to early humans walking upright.
These changes occurred in the human pelvis, which developed differently from that of our primate relatives millions of years ago.
- One genetic change rotated the ilium, the bone where hands rest when placed on hips, by 90 degrees.
- This rotation reoriented the muscles attached to the pelvis, transforming a system for climbing and quadrupedal running into one for standing and walking on two legs.
Changes in gene activity reshaped our ancestors’ hips, laying the foundation for bipedalism.
Author's summary: Genetic shifts helped humans walk upright.
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