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Here's a better way to talk about hair
Short Wave
Does Hair Really Provide You With Any Protection?
A lot of mammals keep their fur because it protects them from the sun. We traded all these hair policles in to sweat glands so we could sweat evaporate and stay cool. So why would we have kept it on our heads? And on top of that, you had this really fragile brain that you are trying to protect. Do not go out there with your bald head into the sun, or you will cook a bit. If you have straight hair, you 're not much, much better off.
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