How Humans Lost Their Fur

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Published 2020-12-02
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We’re the only primate without a coat of thick fur. It turns out that this small change in our appearance has had huge consequences for our ability to regulate our body temperature, and ultimately, it helped shape the evolution of our entire lineage.

Thank you to Julio Lacerda (twitter.com/JulioTheArtist) for the excellent Australopithecus and persistence hunting Homo erectus illustrations!

Produced in collaboration with PBS Digital Studios: youtube.com/pbsdigitalstudios

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References: docs.google.com/document/d/1lK7WE3Ozf2da-iARlmEb60…

All Comments (21)
  • @lukekoeferl2995
    Human persistent hunting is literally the stuff nightmares. tall thin creatures slowly chasing you forever until you die. you can outrun them for now, but they’re still coming and there’s nothing you can do to stop them.
  • @Rubrickety
    When do paleoanthropologists think Homo Erectus first evolved the ability to conceal its genitalia via clever camera angles and obstructing props?
  • A man who lived with a tribe in the Amazon or something, said they ran for 5 hours and the tribe only stopped for a handful of muddy water, then kept running. Literal machines & all extremely physically fit
  • @Avintrue
    Jane Goodall also suggested that we spent time in water, another way to cool down, which also caused most other mammals to go hairless. As it happens, prime apes today will always walk bipedally in water which could point to how we began to walk bipedally more often as well.
  • @ManicPandaz
    You know when you look at a sphinx cat and say, “oh my god what happened to that cat?!?”, that’s what other apes think when they look at us.
  • @choobooloo1
    That is some very strategic gazelle ear placement.
  • @acslater017
    I probably come to this realization after every Eons video, but it’s simply stunning how much we know about life, history, and our planet. So much of this was unknown just a few decades - and definitely a few centuries - ago. We have come to know so much, the last remaining questions are things like, where did the entire cosmos come from. And in a sense we do have decent, if incomplete, answers at that. And now I’m absorbing an overview of a few million years of evolution on my handheld supercomputer in my climate controlled bedroom. The power of science to enlighten and improve the human way of life is without compare.
  • @workmix5246
    Major props for clarifying your use of the word “we“ I wish more people would. The most carelessly bandied-about word in the English language— in any language.
  • Having once had the experience of being unable to sweat for a period of several months, I can say with certainty that sweating is a deeply underrated human ability. You may think sweating is gross or inconvenient, but it's a whole lot better than not sweating!
  • @gramsay69
    The fact how they gathered all those informations is absolutely incredible.
  • This is one of my favorite Eons episodes. All of the human evolution ones are. I've always thought: we're such a unique mammal! We're the only mammal that stands on two legs, the only mammal without fur, blubber, or any other thick insulative substance, and so on. These videos explain them in a clear and concise(as well as fun) way, and I love them!
  • @popindosin228
    Title: How humans lost their fur Me looking at my belly: They know nothing, my friend.
  • @casbot71
    Tier Zoo: Human sweating is OP.
  • Fascinating as always. Just hearing how we adapted to our surroundings over millions of years and then finally destroying ourselves and the environment in a relatively short years is breathtakingly stupid.
  • @stevendunn2501
    There’s actually a really cool video on YouTube of a group of San hunters in South Africa engaging in persistent hunting. An amazing video.
  • @Alias_Anybody
    "What did 500 million years of evolution lead to?" "Naked sweaty men"
  • @susyshepard320
    I was a nurse for almost 40 years. I've seen a lot of naked people and I've got to tell you some people still have " fur".
  • This is most likely how we were able to hunt very large and powerful animals without suffering constant losses. Just need enough hunters, possibly using torches, to scare them enough to make them want to run rather than fight. In time, they were so exhausted they could not run or even defend themselves, allowing for an easy and safe kill.
  • @LeoDomitrix
    I think we overestimate the ancestral ability to hunt. Groups would drive prey into other members of the social group, who'd then drive it further toward exhaustion, etc., more than just three guys running down the gnus of the past. We also probably had some capacity to nest up and cuddle, as many animals still do, when chilled. Sweat, btw, is a hidden blessing. Beats wallowing in mud or living up to th eneck in water like pigs or hippos, respectively!