But it turns out we are asking the wrong question-at least according to scientists who study human genetics and evolution

But it turns out we are asking the wrong question-at least according to scientists who study human genetics and evolution

Millions of modern humans ask themselves the same question every morning while looking in the mirror: Why am I so hairy? As a society, we spend millions of dollars per year on lip waxing, eyebrow threading, laser hair removal, and face and leg shaving, not to mention the cash we hand over to Supercuts or the neighborhood salon. For them, the big mystery is why we are so hairless.

Millar says understanding the way the inhibitor system works could also help in research of other skin conditions like psoriasis and vitiligo, which causes a blotchy loss of coloration on the skin

Evolutionary theorists have put forth numerous hypotheses for why humans became the naked mole rats of the primate world. Did we adapt to semi-aquatic environments? Does bare skin help us sweat to keep cool while hunting during the heat of the day? Did losing our fur allow us to read each other’s emotional responses such as fuming or blushing? Scientists aren’t exactly sure, but biologists are beginning to understand the physical mechanism that makes humans the naked apes. In particular, a recent study in the journal Cell Reports has begun to depilate the mystery at the molecular and genetic level.

Sarah Millar, co-senior author of the new study and a dermatology professor at the University of Pennsylvania’s Perelman School of Medicine, explains that scientists are largely at a loss to explain why different hair patterns appear across human bodies. “We have really long hair on our scalps and short hair in other regions, and we’re hairless on our palms and the underside of our wrists and the soles of our feet,” she says. “No one understands really at all how these differences arise.”

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