How Humans Lost Their Fur
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- čas přidán 5. 06. 2024
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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 ( / juliotheartist ) for the excellent Australopithecus and persistence hunting Homo erectus illustrations!
Produced in collaboration with PBS Digital Studios: / pbsdigitalstudios
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References: docs.google.com/document/d/1l... - Věda a technologie
I'm not going bald, I'm evolving.
I never though to look at losing my hair in that light. Now, I don't feel so badly about being bald.
😂😁😂😁😂😁
I always thought it was weird how we have alot of hair ontop of our head
My art teacher is bald. He had evolved way too far beyond
God only made so many perfect heads. On the rest, he put hair. 😉 😊
your right
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.
🤣🤣🤣
And on top of them planning they might even start throwing things at you when you stop moving.
@@Austin-cn8vh Sharp things.
It follows 😳
Ah, middle school
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.
Well i rekon they would have drowned if they didn’t stand up in the water😊
with no proof at all. completely assumptious, and a figment of her imagination.
@@rimrejectsand that is how theories begin. Many other anthropologists believe we lost hair by swimming and considering our beginnings next to the sea, it makes a lot of sense. In fact, it makes more sense than jogging it off. We evolved in the Rift Valley with mountains, rivers, streams and ocean, rather than open plains.
@@BBMc107 where’s the evidence for humans, or any species for that matter, evolving into a completely different kind. It’s all narrative.
Don’t think it was Jane Goodall, was Elaine Morgan and a theory called The Aquatic Ape. David Attenborough did a documentary on it years ago, very interesting and talks about the water giving us ‘blubber’.
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
I saw Joe Rogan interviewing David Choe and he told that story when he travelled to look for dinossaurs.
How easily we forget what wonders our bodies are capable of.
@@sirreginaldfishingtonxvii6149 we aren't forgetting we just never get the chance to experience it. Because a lot of us would die doing so.
@@eliezeretecap Joe Rogan is an idiot masquerading as a genius. The laughable part is that some people buy it, and they are making him a fortune.
You seen thaton joe rogan
When do paleoanthropologists think Homo Erectus first evolved the ability to conceal its genitalia via clever camera angles and obstructing props?
omg SKSKSKSK I just noticed them
Enquiring minds want to know!
Probably when they became Erectus and embarrassed in public for the eternity.
Do you think the Erectus bit relates to their stance?
not to mention their buff bods. They must seriously work out.
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.
Okay this brought a chuckle in me 😂
That’s exactly what I thought while watching the video and then came down to find your comment 😃
"Fellow ape, what happened to all your fur?"
😁😁👍👍
I thought about hairless animals too lol some people think they’re so ugly…we’ll sorry buddy you’re one of them 😂😂😂 I think hairless animals are adorable!!!
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.
*Word of advice...* Don't store too much of it. The info will be changing in a few years. Trust me.
Ah my bed is where I spend much time with my phone.
@@Britton_Thompson It does change. Progress and the accumulation of knowledge is not a straight line up. It zigs and zags. But if you look at any decent time interval, say twenty years or so, you can easily see that overall our knowledge is moving upward. What we do with it is another thing. Some people, of course, will take the opportunity of a zig or zag to assert that science is and experts are unreilable and worthless, that any old person can use their common sense to know what is what. Well, pretty much all of medical science, for one example, disproves that notion. Which is why we go to an oncologist if we have cancer. Disregard their advice at your own ignorant risk.
Pretty sure we're entering the next stage of evolution in the coming decade. Artificial intelligence. It's going to take over sooner or later. So much for all that running in the savannah. 😅
you think science is going to tell you where the entire cosmos came from..?
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.
*Tier Zoo:* Human sweating is OP.
Well,it is
Indeed
Highly based, very pog.
I’m sweating rn! Lol
this would've been a perfect topic for a collab :p
That is some very strategic gazelle ear placement.
Relevant username?
And antler placement!
That's evolution for you.
@@horseenthusiast1250 well the antler is part of the gazelle
It's an Nyala, they are way bigger than Gazelles and have different colouring
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!
We’re not the only mammal without fur. First, we do have some fur, just not as much as most mammals. Second, there are many examples of other mammals that don’t have much hair, some which have less than us in fact. Elephants, rhinos, hippos, whales, aardvarks, I could go on. There’s plenty of examples of mammals that are relatively hairless.
Well.. some of us still have blubber :D
the loss of fur for sweating is more beneficial in terms of releasing heat but also cooling during that process. evaporative cooling really does work, you ever sweat a bunch then transition to a place where you’re not sweating anymore and feel super cold. when our ancestors finally sat down under a tree after running after a deer for 5 hours, i’m sure their sweat drying up felt like AC on a summer day. another analogy that can be used to demonstrate this is when you rub alcohol on your skin it feels super cold and dries up quick, this is because alcohol evaporates almost immediately from your skin and you’re feeling the cooling effects of evaporation
Yeah, anti-perspirants are a double-edged sword, especially without AC.
"What did 500 million years of evolution lead to?"
"Naked sweaty men"
😂👍🏼
Sounds great, honestly
Mmm😋
Jk😂
Water cooled xD
18 of them too...
Title: How humans lost their fur
Me looking at my belly: They know nothing, my friend.
we still have it. its just not as thick as before
@@judas1523 You sure about that?
As a full blown Latino i know about body fur...
In some avenues of the variations of the Homo-erectus species, some Neanderthal genetics are still prevalent
@@jonnyrocket3659 True. However, that doesn't mean high levels of body hair are always caused by Neanderthal genes. If humans lost body hair due to natural selection, then we can assume some humans had more hair than others. It's possible that once a certain point was reached, more or less hair didn't make enough of a difference, so those genes passed on. It's also possible that when humans started wearing more clothing, the selection pressure against hair was reduced, also allowing those genes to pass on. Thus, whether or not a person has lots of body hair might not be based on their Neanderthal heritage.
The fact how they gathered all those informations is absolutely incredible.
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.
Why didn't the prey animals also evolve to be hairless and out run humans?
@@xonx209 Because overall their form was well adapted and humans posed little threat to the species because of that adaptation.
wow, awesome way to restate what they already said in the video!
@@octilli At no point in this video does it mention combining persistence hunting with the use of fire. That would be a turning point in our hunting techniques allowing us to successfully hunt much larger game providing much more meat. A large aggressive animal would charge a small group of hunters, but not if they were wielding fire.
Persistence hunting is now called a 9 to 5. That’s how humans lose their souls.
Not unemployment?
😄😄😄
Doing what people tell you to do even though you don’t agree with it. Crushes the spirit, that does.
Persistent hunting... you mean more than 3 minutes?? XD
Persistent hunting is when you get a call from an insurance sales rep.
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!
Truth. Our daughter has to take an antiepilectic medication as a toddler that has the unfortunate side effect of suppressing your ability to sweat. That was the most stressful summer ever! We had to be so careful how hot she got! Fortunately, we failed that med and moved into another. It took years for her to fully recover her ability to sweat!
@@jolenethiessen357 ...I would probably freak, and just constantly spray myself with water if I lost the ability to sweat.
This isn't really the same, but one time I lost my voice from screaming too much the night before, and it was absolutely awful not being able to join in conversations and having to keep everything I want to say in my head. It's like I didn't even exist :(
@@jolenethiessen357 ...Out of curiosity, was that antiepilectic medication called Tryleptol? Because I took that as a kid as well, and that got frightening and frustrating in elementary school. Recess in a Texas summer is hell on its own, but not being able to sweat and with minimal shade on the playground was actually straight up dangerous for me. Not that the school cared. No amount of my parents trying to convince teachers to let me stay inside and read ever worked. I'm genuinely lucky I didn't die of a heat stroke.
I sweat very little, and indeed, overheating is a problem.
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.
I know, really? Somehow getting exponentially smarter about the world around us made us blind to constructing an existentially disastrous way of life in that world. The irony.
Longevity is increasing around the world. We're not endangered. The jury is out on the environment.
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!
Hippos can sweat.
They also turn pink when they do it.
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".
I worked with a guy that seem to have more hair than body. He always joked about it. I sort of felt sorry for him. He was a great guy with an awesome personality.
@@MG-mj6zi I also feel sorry for great guys with awesome personalities.
@@abebuckingham8198 Why!
@@MG-mj6zi You don't know? I mean, you said it first.
I see you are not one of them. You rather poke fun than to honestly help a person out. Thanks for the cue though...
10:57 "having hair on our heads …"
*A lot of Men over 40:* [sad noises].
Peach fuzz.
Cave men wouldn't live past 40 so it doesn't matter to them
You could argue that bold men are taking this evolutionary trait one step further... maybe more evolved even 🤣
Cries in 17 with receding hairline.
cancer patients: [sad noises]
Thank you for downloading excellent job on this video PBS did wonderful?
Great editing. I never knew you could tell that much information with the same three stock images of homo erectus taking down a gazelle with their bare hands and sweat glands.
As an Australian entering summer, I sure am glad I have 2-5 million sweat glands right now. My clothes might beg to differ though
So gealous, here in Italy its like 15C during day time :(
It's winter in the rest of the not upside down world
@@Lumberjack_king yes I own a television and the internet. Our media has also been consumed with white christmasses our whole lives so we get it :) trust me. Meanwhile I’m sitting with my feet in an ice bath to cool down.
I am sure americans will ask why is it summer in australia
@@brunoventina7619 summerheat, its below 0 here since last month. Will last til about march
bruh just imagine being an animal and being like "phew I lost those humans" and then you just see an army of screaming monkeys with spears charging at you.
Each with the newfangled atlatal, an extension device that doubles the throwing distance.
You thought the silly human gave up. He used communication skills to obtain backup.
Humans are OP in crafting and communication. We've min/maxed fur for brains.
We are designed to throw, and rocks are everywhere. Many villages in Asia throw rocks and use simple slings to hunt, so it's speculated we had tools and probably picked up a 3lb rock to hunt with then use the tools to get the meat, I mean I killed squirrels and birds the same way as a kid in the country. My 2 year old can throw a tennis ball 20 feet with no coordination
@@MadRabbit0wnzu what does that have to do with my comment?
*Tall, naked, sweaty figures running at you appear over the horizon*
@@sboneliberator1977 It has to do with your comment because it extends the case for how dangerous humans have been to animals that they outran, outsmarted, and outthrew.
I look at my chest and back every now and again, and come to the conclusion that humans have definitely NOT lost their fur.
They mean a thinner layer of fur. Even with very hairy humans, they have thinner hair in comparison to a bear or dog or smth.
I always wondered about this. Thanks for quenching my curiosity.
Persistence hunting today:
**Drive to 17 different retail outlets looking for a PS5.**
Check Facebook market
@@ironman332 Nope. Not buying from scalpers.
My mother did that for Beenie Babies.😆
@@ironman332 hehehe i have met 30+ fake ps5 seller now. I dont think its a good idea
The hunt is ON my friend!!!
the person who counted all the sweat glands were def doing it for their phd
Imagine all the knowledge we wouldn't have if it weren't for poor, underpaid, overworked grad student grunts
@Phil Weatherley Personally? Nothing. I was in Comp Lit :P But I commiserate with my colleagues over in the sciences!
It’s what people do when they are madly in love🤣
getting a phd is persistence hunting
"Trust me bro I'm doing it for science it's not like I have a fetish or anything"
I truly enjoy this channel and learning more about evolution. Please consider creating one that’s targeted to elementary school students.
Excelent, and with your voice it sound easy to comprehend.
Next deer season I’m leaving the rifle at home and just chasing them around until they collapse of exhaustion
Ok. I suggest you start ultra running training program before doing that. 99.999 % of modern people live too soft life to hunt like that.
@Michael Miner Feel cold? Run harder. 😉👍
@@rickrandom6734 nice, I’ll look into using my rifle
I'm afraid it won't be the prey collapsing of exhaustion
My grandmothers brothers would do this. They would run hours through the jungle running after deer, which is pretty metal.
3:24 "This has made a lot of people very angry and has been widely regarded as a bad move"
nice hitchhiker's guide to the galaxy reference :)
Return to monke
@@pimd6998 mmm
Many solutions were suggested for this problem, but most of these were largely concerned with the movement of small green pieces of paper, which was odd because on the whole it wasn't the small green pieces of paper that were unhappy.
RIP Douglas Adams, my son and I have you fondly in our thoughts, we are currently listening to the original radio plays.
There’s actually a really cool video on CZcams of a group of San hunters in South Africa engaging in persistent hunting.
An amazing video.
Fascinating answers to Fascinating questions I've never thought to ask.
I dunno. I've been to water parks. There's still a lot of humans out here with a thick covering of fur........
I am one of those humans
@PewPewZee LawL the hell r u talkin about?
She forgot to mention beard hair and why it still exists she only talked about head,armpit and pubic hair I think she forgot beards exist
@@user-xg3un6pl5j facial hair looks cool... duh
Dawn of the Planet of the Apes?
So if hair is fur, does this technically mean my beard is a luxurious mane?
Yes
Yes
Yes
Yes
Only if it's luxurious
Great episode!! Good chuckles too.
I really enjoyed this and I like the direction that the hypothesis is going. I’m still curious about how we were then able to keep warm enough at night. Fire was still a long way off. You are right about the importance of sweating. I have a sodium/potassium imbalance and so I hardly sweat at all, which means that I do a fair amount of fainting in warm weather. Fortunately, I did not pass it on to any of our children. :-)
I imagine they used animal skins and fur, and maybe collected grass/hay, along with various kinds of shelters.
"They couldn't have survived being hairless at night" she says as I sit in my badly insulated room in a basement in the Midwest *in December.* Now, if you will excuse me, I'm going back to sitting closer to my space heater than is recommended.
Ahhhhhh... toasty... 😊
What's a heaters???
@@rubyamateurtactician4354 Molto Bene!
@@charlesroberts3650 uh... no hablo le French?
I live in Phoenix. It was 99degrees last month. Hopefully December doesn't get that hot or we'll be having Christmas in the heat, like Australians. :P
One very critical aspect of having hairless skin is that you then can have tattoos, which are important for coolness (though not thermal coolness).
No, but coolness is important to survival, I have a coverage of 2% coolness from tattoos.
gotta wonder if black tattoos get hotter, brb gotta stand under the sun.
and injecting metals and other unknown substances into your body
@@toppermost66 water under the bridge, my friend. water under the bridge.
I have none. I want to stand out and not be like everyone else.
Watched all of it , just amazing and edifying
I'm really curious about the Austrolopythecus calorie counting conclusion, could you link the source of that research so I can understand it better?
WHERE IS STEVE?!?!?! WHAT HAPPENED TO STEVE, AND WHY AREN´T WE THANKING HIM?!
Sadly he stopped being a patreon u.u
They mentioned a while back that Steve was regretfully no longer able to financially support the channel. I miss Steve
He was like a brother to me
we miss you steve 🥺
RIP Steve you'll be missed.
"our species is exceptional at persistence hunting"
And yet I tire after 1 minute of running lol
LOLOL the SAD truth
Probably because we lack training. If we practice running for longer periods of time, I think our body would adapt and make us have longer endurance.
But in a real situation, like hunting down animals, you would have so much adrenaline in your blood that you would be able to run much faster and much longer
Technically you don't even necessarily have to keep up a run to do persistence hunting, so long as you are able to keep tracking your prey and keep it running from you enough to tire it out.
@@keelanc1681 Yes good thing our species dominated the food chain.
I love this channel! ❤
very awesome explanation of human evolution. 💕
thank you. 🤗
Humans: Lost fur
Also human: Is cold other animals give me your *SKIN*
*This is an unbalanced patch*
Tierzoo has entered the chat
The ability to put clothing on and off their bodies is one of the most important traits that lets humans adapt to any climate in the world. The devs thought this is the best way to narrow down humans' roles but it was an unforeseen buff that expanded human builds that can excel in multiple servers.
@@MrH2O1998 i read that update patch with his voice.
survive, adapt, overcome
People only got cold after leaving Africa, so... that came later.
The more I learn about our ancestors, the more I respect the abilities of Homo Erectus. Seems like a tough survivor, and succesful preditor.
Home Erectus will probably end up having a longer tenure than "the wise ape"
@@coolworxyeah definitely, it hasn’t even been 15,00 years since civilization started and we’ve already begun destroying the planet
Definitely a stand-up guy 👍
@@mrcool7140 Saw what you did there 😁
A Homo Erectus child would likely wipe the floor with an average Homo Sapiens adult.
Excellent...never even thought about this before.
friendship ended with fur, now sweat is my best friend
"Hey, you know those skin pigment adaptations to intense sunlight?"
"Yeah?"
"Let's fight over that for most of our species' history!"
"Okay."
Love this dark joke🤣🤣🤣
This.
Actually nobody cared until colonization of Europeans began like 500 years ago.
Lollllll😂😂😂😂😂
@@fenrirgg I'm pretty sure all the way back in the BC's there was discrimination based on many things; tho, skin color may not have been a direct thing people were discriminated for, different cultures and regions were discriminated against and different cultures can have consistently different skin colors, so you can see how this was always, kind of, a natural extension of discrimination. Now if we can only get rid of all the discrimination, the world would be a better place.
Me looking at my back in the mirror: We lost our fur?
Most of it
Haha
You are very slow in evolving, most of us lost the back hair
@@Q8Ubermensch no
We going back to our roots homie! These hairless apes forgot where they came from.
But we run so damn slow. I thought most animals were so much faster that they would’ve been long out of sight before tiring out
Great job!
The fact we opted for the weirdo “I’ll keep running and running and running” hunting method is so funny to me.
Persistence paid off.
One of my favourite things about ancient human science drawings is the “potted plant” in front of males
Or the “antelope ear”.
Or fact that there are practicly no females
@@ImieNazwiskoOK a common male sentiment.
@@ImieNazwiskoOK of course. That requires more strategic placed objects, which weren't as plentiful in that era.
What about the image at 3:03 ?
i knew a kid who couldn’t sweat back in elementary school and i didn’t really think about that must’ve genuinely affected him. imagine being in 1st grade and having to stop every 5 minutes on a hot day because you don’t make that smelly, sticky skin water
Thanks for an informative video
I am 55. I am so happy to know I am not getting older I am just rapidly evolving.
I'm guessing it's your head only. High five, fellow evolved hooman!
I think im devolving
Yeah well my hair is falling off my head and settling on other parts of my body.
I’m not going bald I’m just redistributing my hair
@@neilchapman5145 I presume they are moving downwards? It's called gravity buddy
More like retroactively decaying. We start active process of dying the moment we pop out the womb.
Babies have fur in the womb called Lanugo. It's usually shed by the time they're born but some babies are still covered in it at birth.
@Snappy Ape power snack
ewww.
This is true
i had that all over my back! :D
*barf*
I can’t believe you have photos of the first humans running.🤯
We still have a little bit of fur. It just very thin and called hair now. Or at least most people have a thin layer of peach fuzz. Some people also have very thick hair. Once in a while you see people who are covered with hair due to a genetic condition too. But that is rare these days.
Ah, such a cleverly placed antelope ear.
All the better to hear you with.
Don’t forget the antler
3:49 Read this comment just at the right time. Made it twice as funny.
Panting: air cooled, low heat dissipation, inefficient
Sweating: water cooled, high heat dissipation, high performance, energy efficient, significant boost in processing power
Phase change cooling
In short, humans can recover stamina faster than any mammal on the planet.
You are mistaken. Both are phase change cooling. The difference between both is the area where the phase change occurs.
@@DanDanJanJanJP This.
@@prestigev6131 no, some dogs are between , but they are few breads.
10:00 "we average about 1 liter per hour" talking about sweat loss. Hell no we don't. No human is drinking 24 liters of water per day.
Proof that the term:
"Sweaty try hard" is actual a compliment/term of endearment lol
This was very interesting, as Eons always is, but I just wanted to add the hypothesis that pubic hair and armpit also may be an adaptation to help prevent chaffing during physical activity as it helps to prevent the skin in these areas from rubbing against skin.
That and protection in the case of the pubic area. For women at least, pubic hair is a great barrier-almost like eyebrows-that catches things to stop possible infection
Also, armpit hair is like a built-in evaporative cooler in each armpit.
True.
I concur
So are you saying we shouldn't be doing lazer Brazilian's?
_"Fur and hair are the same thing."_
So tigers are gingers?
Morris!
Just like orangutans
They have no soul.
@@epauletshark3793 I-
Tigers have no souls or gingers have no souls?
@@alex-fs9yt gingers have no soul. If tigers are gingers, they have no souls.
The Aquatic Ape theory is stronger.
Strangely enough, woodhog has 3 hairs in one drill, but they can't sweat. So it's the habit to lay-in mud-pool to cool-down.
What I learned from this video: Kallie really thinks sweat is gross. Really.
Seriously, I loved this video. Fascinating topic.
Methinks the lady doth protest too much, perhaps she’s deflecting her fetish?
(Sarcasm)
Only a desperate girl can say shyt like "Sweating was a huge perk for humans: It allowed us to out run and hunt animals like lions, leopards, cheetahs, bears. BUT SWEATING IS SO YUK! Hahahehe... :( Does anybody like me now? ;( " No... we can still see your face
@@MarkdjRace you alright there? Bullied because of hyperhidrosis?
@@Gothic_Analogue Instead of being sooo "grossed out" by one of most important human adaptation (in science video btw) maybe you could just find another way to feel included. Maybe to tell appeal to children to actually sweat once in a while - fight that obesity epidemic among your nation. Showing off with ignorance is wrong way to feel included. What do I know... roll on then.
@@MarkdjRace I don’t recall the part where I eluded to being grossed out by water and oil being secreted out of a flesh crease.
And we are fighting the obesity epidemic in the UK, by ensuring all the kids that need free school meals don’t get them. Duh!
EDIT: wait, did you think I was a US citizen? Ahahahahhaha. You’re funny.
So basically because we got a cpu upgrade, we needed to upgrade our cooling system to prevent from over heating nice
Like the PS5.....oh wait (....console starts shutting Down due to high temperatures. ...🥵😒)
Lol
Nope, wrong. We upgraded our cooling system which allowed us more wattage, the increase in wattage (energy/food) allowed us to increase our CPU.
exactly my nerd boi
I've been thinking about this the last couple of months.
So it's an interesting theory about the sweat, I also hear that if we hadn't "lost our fur" it may have effected the intellegence we've developed as we have found many other ways since losing the fur for compensating for this.
So losing the fur is one problem.
The other one I have is that, okay, we've lost our protective fur, but why is the skin we have been left with, so weak and easily damaged, and overly sensitive? We don't even heal from this damage particularly quickly or have decent immune resistence to the contaminants we get in damaged skin. Our skin is so weak, it can be cut or damaged on anything, forget preditors. Actually, forget predators, our skin can't even handle insects.
And the crazy part is, we're the only animal that has developed in this nonsensical way.
For some reason this video has been in my queue for years and I never watched it. It was great like always with Eons, but now I'm curious... How did Homo Erectus or other sweaty early hominids deal with water intake and salt intake?
The fact that we lost our fur and then started using the skins of dead animals as a substitute is absolutely *brutal*
Nature itself is brutal and we are a part of it.
It's awesome. Hey, can I borrow your skin
Some call this, 'a pro gamer move'
Fur has its uses. It’s just nice to be able to take it off sometimes.
We woke up and chose ✨violence✨
Our Apocrine glands also serve the function of scent-recognition. We on a subconscious level store the memory of each other via our individual scent. Mothers of newborns produce a particular body scent that infants use to bond, and research has shown mothers and babies can identify clothing worn by one another from a collection worn by different individuals. Close couples can also recognize each other’s scent from clothing in a blind test. Splendid video as always. Many many thanks indeed.
When I was in school we used uniforms, so all our clothing were the same, but I swear that I could tell which sweater belong to each of my friends because each of them have a particular scent
@@pvallesol I can tell who's been shitting in the toilet at my company by the smell. It's a curse I tell you
@@Rig0r_M0rtis wow 💀
And yes I think you were spot on on pigmentation admination. Directly linked to descendants. Ancestories location on the planet
long distance running is the most overpowered hax we have 😂😂
Just something else to point out -
(Warning: kinda gross)
We can also tell when we lost our hair by studying our lice. The closest relatives of head lice is chimpanzee lice, and they seem to have split the same time we and chimps did.
But PUBIC lice, on the other hand, share an ancestor with gorilla lice, and seem to have diverged only 3 million years. Considering that they should have been outcompeted by the lice we already had, that indicates that by this point, hair was already reduced to a few areas on the body, allowing both species to live on us.
Bit awkward, though...
This is both the best and the grossest comment!
Interesting, who knew lice could be the grossest evolutionary time stamp ever.
that is actually super interesting, now I want to watch a Eons video about body lice.
And with the advent of... "landscaping", pubic lice are less common.
Pubic lice are from gorillas ... I think there is a question in that statement best left open.
Science: sweating has made us what we are today
Scientist: "gross"
Kallie clearly has mixed feelings about sweating.
Embaressing
The fact that it used to help is, doesn't mean that it does help us today
And the fact that it does not and is a liquid full of bacteria is gross
@@alezar2035 Go for a proper run and you ll realize how important that is.
And there is quite a difference between sweating into occlusive clothing than sweating to reduce your temperature.
@@alezar2035 Try working in a +40C climate and then say sweating doesn't help.
"homo erectus hunting 5 hours straight" would be a good youtube video title.
Evolution: when did sweat become gross?
About the same time we evolved different tastes.
So the next question to be answered is, "When did human hair become migratory?" All that scalp hair keeps moving to ears, back, etc...
I don't know any specific research on male pattern baldness, but i imagine it's one of evolution's unintended casualties.
MPB can at least partially be explained by head shape, which cuts off elasticity to the scalp, causing the follicles to encrust. Having a larger brain, could explain the change in head shape, and may explain why it was never selectively eliminated by females.
You guys are missing the fun in characterizing the condition as "migratory" hair.
...nostrils...
It makes you more streamlined and aerodynamic.
"humans don't have a thick coat of fur" hangs my head in shame. Guess that confirms it I'm not human
@@Yigash (makes chewbacca noises in response)
so many men have "pelts"
I think you're confusing that with your sweater
Don't worry bro
Eons have Primitive human fetish
Hey, it's ok to shampoo your back.☺️
I love this educator she makes thing understandable
Wow, great info.
The dating could also add the differentiation of lice. We can look head lice and pubic lice and date their ancestral split. It tells us when they stopped covering our bodies, and only had access to 2 main areas
There are studies on this subject. Interestingly pubic lice is more closely related to gorilla lice if i remembering correctly, but in order for us to catch it we would have needed (probably wrong tense, i am sorry) separation in hair coverige between pubic area and head. So it is definately possible to use lice genetics but with the use of pubic and gorilla lice ancestral split date which makes it even more fascinating in my opinion :) (i hope i remember it correctly 😅 )
Have you heard of the Baboon Gene? Primates throughout Africa have it in their genetic makeup to combat a deadly virus which nearly wiped the all out.. Except humans that is. So at some point, Man wasn’t in Africa at that time of that disease, so where was he? Some say he was marooned for thousands of years on an island cut off from the main body of Africa due to sea level rising and couldn’t have gotten it, therefore having a semi aquatic life finding food off the coast which also gave him access to Omega3 , which increased his brain capacity and descended his larynx for diving. Which many aquatic mammals have achieved. Oh and led to hairlessness on most parts.
I sweat so badly that it's borderline embarrassing. Getting to class in college even during semi-warm temperatures would require me to get there ten to fifteen minutes early so I could have time to not look like I ran there. I have no tolerance for the heat in general.
I feel you bruh, the bad thing is that I neither have tolerance to slightly cold climate
Im the same! One nice person thought I had glitter in my hair lol but no, it’s sweat.
The trainer dude at the gym I used to go to always teased me for how sweaty I got lmao it was embarrassing
Yeah this is also interesting, why do some people sweat more then others? Why do some people have more „fur“ then others. Evolution at it’s finest 😂
@@TinyCloud90 Same reason people have different skin and eye colours. Different genes.
Perfect place to ask this question which I always wondered, why do we have eyebrows? What function does it serve that is deemed necessary that it’s not lost to evolution
Could either be as a physical barrier to water or dust etc, or a communication thing. But I'm not sure how that would work as far as natural selection goes.
@@chickenfist1554 if you have more hair on the eyebrows youre less likely to go blind because of dirt or stuff like that, and also be able to better communicate and hunt/survive
sweat is not gross to everyone
With correct diet, it's not gross. Modern diet makes our sweat smell bad.
For those wondering, yes, some tribes in Africa are still using persistent hunting today, look it up, is amazing
Yup, do it, it’s actually incredible
Yes. It was one nature programme that actually made me proud to be a human. The hunters are awesome. When they finally run it down exhausted, they humbly ask forgiveness of the antelope as they finish it off.
technically we are still doing persistence hunting with marathons... its just that the hunt is symbolic, but its the same idea, long distance running over speed.
@@danilooliveira6580 u right makes sense
@@jsalinas2068 I mean... technically it symbolize Philippines running from marathon to athens to deliver a message. but I think you got what I meant.
tl;dr: humans went to the top of the food chain by becoming sweaty tryhards
We literally become sweaty tryhards...
“Tryhards” is my new favorite word
omg we're all sweats
We literally sprinted during the warmup lap in gym class
Go vegan we’re not part of the food chain anymore (from a wildlife biologist)
Nice ideas to consider, thanks :-)
Who made the image od the wall on minute 6:07??
My family are Italian. We never lost our fur. lol!
That is what I'm so curious about! Some of us are super hairy and others not at all. What does that mean genetically?
My husband is Greek, this is news to me that we lost our fur....
Im Jewish, this is new to me as well
Thankfully, your statues did.😉
My ex's dad was from Armenia, he looked like shag carpet wearing a Danny Devito mask lol
Brain: Oh look a new TierZoo video
Brain: Press that PBS eons one
whats a tierzoo
@@papasscooperiaworker3649 Another CZcamsr who talks about the world but with video game terms.
@@papasscooperiaworker3649 it's great channel. He already did this topic and its awesome.
The titles to these always remind me of the Just So stories by Rudyard Kipling. 💚
We didn’t lose all of it. Just most of it.