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Hair Variation, What’s Her Story? with Dr. Tina Lasisi

Getting Better with Jonathan Van Ness

00:00

How Has Hair Evolved Through History?

The reason we lost our body hair as o with thermo regulation, and specifically trying to keep our body temperature down. So what humans did is they traded in a bunch of body hair follicles for sweat glands. The thing that's closest to the sun your head? You have your brain. Your brain is really sensitive to heat, and it also generates a lot of heat. If you have a big, beautiful afro, that can help protect your head from the sun much better than straight hair.

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