Why did humans shed their thick fur coats to become the only hairless primates?

Nature · Published 29 September 2026 Swipe more like this →

In short: Humans are unique among primates for lacking a dense coat of fur. This physical transition was not merely cosmetic; it fundamentally altered how our ancestors managed body heat and played a critical role in the evolutionary trajectory of our entire lineage.

The loss of thick fur represents a significant shift in human physiology. By shedding our ancestral coat, humans gained a distinct advantage in thermoregulation, allowing for more efficient cooling of the body.

This adaptation did more than just change our appearance; it acted as a catalyst that helped shape the development and survival strategies of the human lineage over time.

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