6 Weird Things That Came With The Human Evolution
Hard to explain stuff that we can't quite figure out why happens.
Published 9 years ago
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Goosebumps are the result of flexing muscles at the base of each hair follicle. There are two reasons humans get goosebumps. The first happens when someone is cold. The second is when you're scared and works much like a cat's fur when it feel threatened - By raising the hair when we’re ready to fight it made us appear bigger. Okay, it would, if we had fur.
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Although wisdom teeth are now simply painful and frail, they once served a very important purpose. A long, long time ago, pre-humans were primarily herbivores, which meant they ate a lot of greens. Because green vegetation takes longer to digest, it needed to be chewed more, and wisdom teeth gave the extra surface area needed to grind the greens into pulp.
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Hiccups are left over from old body parts we no longer needed. There was this thing called a glottis at the entry to the lungs that would close off to not allow water into the organ. While the glottis is no longer there, a small trace remains. This underdeveloped muscle sometimes contracts when sucking in air and this uncontrollable contraction is what we now call the hiccups.
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