Forward asked in Science & MathematicsBiology · 1 month ago

Is this why we are nearly hairless? Or furless?

I am not being racist. I am just wondering. We all know that all the animals in this world are covered by a layer of hair. Even the dogs and cats in our streets all have a layer of fur on them. Likewise, the apes and the ancient ape men, all have a layer of hair on them. In contrast, all men in this world literally have no hair on their bodies.

We also know that from tests ran by researchers, it was found that literally everyone on earth have nearly the same DNA. Our DNAs are more closely related to each other than two alley cats living on the same street

Is the reason why we are all nearly hairless because we all have nearly the same DNA? That is, because we all very closely DNA related that is why we are all nearly hairless?

Update:

We had 2 cats once. Because we only had 2, the off springs they bore all started to have carnal relationships. Before long, their future generations all started to loose their hair.

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  • 1 month ago
    Favourite answer

    Every human being alive today can trace their maternal ancestry back to a single woman who lived about 200,000 years ago we call 'mitochondrial Eve'. This isn't very long in evolutionary terms so yes, we are very similar to one another.

    To give you an idea, if we printed out your genetic code it would be about 262000 pages long or about 175 pretty hefty encyclopedia sized books. The difference between your code and mine, or any other random person would be at most about 500 pages.

    Why are we hairless? There are 4 possible reasons ...

    1. Women and/or men preferred their partners to be less hairy! This would mean that children were less hairy ... in other words, humans selectively bred. There is no real evidence for this so let's cross it off.

    2. In the 60s there was a theory proposed by naturalists like Desmond Morris (he wrote a book called The Naked Ape) who proposed that humans went through an aquatic phase where we lived near water, with evolution selecting for hairlessness and thicker fat relative to apes due to that lifestyle. He also suggested this might explain our slight webbing on our fingers and toes. But most evolutionists now reject this.

    3. Humans were hunters, but thick fur meant we would overheat running down prey in the hot sun of African savannas. The theory is that we lost our hair so we could sweat and cool in such conditions ... less hairy humans were better able to hunt in those conditions and hence supply valuable meat to their families, leading to evolutionary selection for hairlessness. This is one of the leading theories today.

    4. An equally plausible theory is that we lost our hair in response to parasites and bacteria. Hairy humans had to contend with diseases caused by these parasites, which could be fatal. So the idea is that evolution selected for less hairy humans because hairy humans were more likely to die from these diseases.

    So, at the moment, we don't really know but those are the theories ... for now!

  • Tom
    Lv 7
    1 month ago

    There is a theory that we are "Sea Apes"---Lived close to the water, swam a lot and eventually lost our hair.

  • Anonymous
    1 month ago

    no it is not due to inbreeding if that is what you mean.. its due to natural selection!! Humans we have clothing and heaters to keep us warm so we don't need hair! If you look at **** erectus (the ones that discovered fire - cavemen) they are sort of hairless too

  • Dixon
    Lv 7
    1 month ago

    When humans were hunter-gathers on the savanna and did a lot of hunting, one major advantage they developed was the ability to sweat and thus run down large animals such as deer that can't sweat and which are optimised for the sprint escape. This ability to keep cool over a long chase is actually pretty rare in animals (humans and horses being the well known sweaters) and hunters literally chased their prey until it collapsed from heat exhaustion. So this would highly favour selecting for hairless bodies.

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  • 1 month ago

    That is more an answer to how than why.  Why would have to explain why any "hairless" (or nearly hairless) mammal would come into existence.  The spreading of that hairless condition throughout the population is how it would end up that all (well, basically all) humans are "hairless".

    We are far from actually and truly hairless, though.

  • 1 month ago

    No, just because humans share a lot of DNA is not the reason.  There are a lot of animals that are even more inbred than humans, and they still have hair.  Cheetahs, for example: they dropped to less than a dozen individuals about 10,000 years ago.

  • Anonymous
    1 month ago

    Our DNA is closer than cats, but not THAT close.

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