There are a lot of theories about why humans donโt have any fur. ย Weโve narrowed it down to the 3 leading theories for you.
Of the 5,000+ mammal species on Earth, very few are naked. ย We are one of them. ย The basic reason we have no fur is that it must have been an evolutionary advantage:
โAll [no fur theories] revolve around the idea that it may have been advantageous for our evolving lineage to have become less and less hairy during the six million years since we shared a common ancestor with our closest living relative, the chimpanzee.โ – Mark Page/Scientific American
โWhy are we the only hairless primate?”
THEORIES BEHIND WHY HUMANS LOST THEIR FUR:
1. ย HEAT ย THEORY
Africa was hot when we were evolving. ย Real hot. ย Walking upright got us up and away from the hot soil. ย Losing our fur allowed us to lose heat more easily. ย Sweating increased evaporative cooling and cooled us down. ย Once we got upright and started to walk around in the sunny savannah we were no longer in the cool forest of our ape ancestors and we had to lose the fur to make it easier to rid ourselves heat.
2. ย AQUATIC APE THEORY
6-8 million years ago our apelike ancestors lived a semiaquatic lifestyle. ย They foraged on foods found in shallow waters. ย Hair is a terrible insulator in water, so we lost it as the dolphins and whales did. ย (this one kinda sucks to us, it doesnโt have much paleontological support, and just looks at seals and walruses).
3. ย PARASITE THEORY
Itโs no secret that fur hides ticks, lice, flies, and other nasty ectoparasites. ย These creatures arenโt just annoying and blood-sucking, but they bring deadly illnesses like one of the worldโs number one killers: malaria. ย As humanโs brains grew (largely due to the ability to successfully hunt, cook, and eat meat) we became smart enough to make clothes, build shelters, and create fire. ย This enabled us to lose the fur to avoid the parasites while being able to stay warm at night with our shelter/fire/clothing combination.
We know, all of this begs the question: ย โWhy did we keep the head and pubic hair?”
“Despite exposing us to head lice, humans probably retained head hair for protection from the sun and to provide warmth when the air is cold. Pubic hair may have been retained for its role in enhancing pheromones or the airborne odors of sexual attraction.โ –ย Mark Page/Scientific American
Ok, then the final question: ย โWhy do girls have less hair than boys?”
“Once hairlessness had evolved this way, it may have become subject to sexual selectionโbeing a feature in one sex that appealed to another. Smooth, clear skin may have become a signal of health, like a peacock’s tail, and could explain why women are naturally less hairy than men and why they put more effort into removing body hair.โ –ย Mark Page/Scientific American
The one thing weโd like to point out is that our hair loss could very well have been a combination of the first and third theories above. ย Scientists donโt win grants on combining other peoples theories, so itโll be a while before this is explored.
Maybe we have no fur because growing such a big brain so quickly (in evolutionary terms) required so much of the body’s resources, and those with less fur were able to support their larger brains more easily. What percent of blood flow and calorie intake goes to the brain in h.sapiens, compared to chimps? Fur was the most easily replaced body part; get rid of it, more energy for the frontal lobe…
You can choose to not believe in creation but if you believe in evolution, you are a fool. Watch this video from one of the smartest chemists in the world. Itโs a little technical and requires an attention span longer than most here on Snow Brains seem to have but try to stick with it. https://youtu.be/GxdISVWnWTY
omg shocked and intreged by this information I still have fur someone help
Thought people who were your English and Science teachers?? Proofread and check the longstanding proven facts regarding evolution! As a biology teacher, some of you are very uninformed.
evolution of creatures can be proved scientificaly
this is mint info
we were mot first monkey its a lie we are created by god
if you dont belive me buy a monkey pet and check if it turns human!
evolution took milions of years. while at maximum if you manage you will stay with your pety monkey for a hundred year. you better argue basing on scientific proves.
Then why didn’t some of us who live in colder climates get the fur back? Is it perhaps because we weren’t meant to stray from Africa?
If humans kept fur, then there would be no fur farms cause it would be useless, and 40 million animals wouldn’t die from fur farms each year.
Cool info. Always wondered why girls have no hair. Makes sense.
That first photo really is creepy. Yuk, we are kinda gross. I wanna grow the fur back.