Science
Why Only Humans Have Chins: An Evolutionary Happy Accident
A new study reveals the human chin is not an adaptation but a byproduct of evolutionary changes to our face, solving a century-old anthropological mystery.
Key Takeaways
- A new study proposes that the human chin is an evolutionary accident, not an adaptation shaped by natural selection
- No other primate living or extinct possesses a chin, including Neanderthals who were physically robust in other ways
- The finding challenges the assumption that every prominent anatomical feature must serve a specific adaptive purpose
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