Health
Facial Hair Is Biologically Useless. So Why Do Humans Have It? – WIRED
Pubes protect you; head hair keeps you warm. But beards and mustaches seem to exist for mainly ornamental reasons.
- Body hair helps with thermoregulation.
- Head hair protects your scalp from the beating sun, but also traps heat in if youre in a cold weather climate.
- Eyelashes are like screen doors for the eyes, keeping bugs and dust and little debris particles out whenever theyre open.
- Eyebrows impede sweat from getting in your eyes.
- Armpit hair, technically called axillary hair, collects and disseminates pheromones while acting like the WD-40 of body hair, reducing friction between skin on the underside of the…
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