Earwax, Butt Hair, and Other Weird Human Things
You probably know what most of your body parts are used for-but what about earwax? Your appendix? Or hair on your butt? If you're curious about the function of some of these weird body parts, join Hank for this fun new episode of SciShow, and learn why you have a butt in the first place!
Hosted by: Hank Green
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Original Episodes:
Why Do We Have Earwax? - • Why do we Have Earwax?
Why Do We Have Baby Teeth? - • Why Do We Have Baby Te...
Why Do We Have Such Crooked Teeth - • Why Do We Have Such Cr...
Your Appendix Isn’t Useless After All - • Why Your Appendix Actu...
Why do we have Butts - • Why Do Humans Have Butts?
Why Do We Have Butt Hair - • Why Do We Have Butt Hair?
Vestigial Structures - • Vestigial Structures
The tailbone has two very specific purposes. The first, is to fracture when you have a fall that lands you on your butt. This ensures that you will be in excruciating pain, regardless of position you stand or lay, sitting on a donut for weeks, as well as being laughed at for breaking your butt. The second purpose, is to haunt you for the rest of your life. The tailbone has declared that it is now fragile, nee, a delicate little flower, and the slightest misstep will cause it to shift its position just enough to make you howl like you've been run through with an invisible sword. It will make you think that you have broke it again. And again...and again. While there haven't been many studies to date, it is believed, by some, that the tailbone is deeply in cahoots with the pinky toe, also known as the Furniture Finder.
LOL, u just made my day! exactly a few mins before an important meeting, thank u kindly.
my mom had a fall like that, and the pain stick with her since then, been 20+ years by now.
Try shattering it so bad they remove it completely from S2 down. You only need S1 and S2 to keep your pelvis sorta in position. And that's how dangerous riding horses can be.
@@KJ-xx6xr As fun as that sounds, I'm going to pass lol! Mine was broken in 3rd grade when a bully yanked my chair out from underneath me as i sat down. I went straight down - boom, busted tailbone. Forty years later, and I still have so much pain... a wrong movement, or if I sleep wrong, or if I think bad thoughts about wanting it gone, and it shifts its position. I am IRL having trouble walking right now, because it shifted in my sleep a week ago. If I could do the remove completely thing, without the shattering, I would be signing up immediately! :)
😂
"Butt hair" - I can't wait to casually slip the topic into casual conversation. My friends and family have no idea the excitement that awaits them...
"The Mainstream Media doesn't want you to know the whole truth about science. Guess what I learned on KZhead today?"
It’s like trying to clean peanut butter out of shag carpet 🤣🤣
Butt hair is nature's fart silencer
😆
Lol, I bet your dinner table conversations are pretty interesting!
"Ear wax is weird and greasy, but it's doing it's job." Me too, earwax, me too.
This deserves more likes.
I think earwigs are strange also. But they stay crispy in milk.
@@indridcold8433 I never understood the idea of earwigs. Most people I know don't want hair coming from their ears yet there are few people that, apparently, buy a wig specifically for that. Oh and Indrid, can you please stop grinning it it is rather creepy.
@@claytoncourtney1309 We need to put this strange conversation on the front for all to see! It is strange, but Iove it!
@@indridcold8433 I just find it very interesting that just last night I showed my sister and my brother-in-law the episode of "bedtime stories" that talks about you.
I'm 50 years old and still have a baby tooth. My adult tooth is up there, patiently waiting for its moment to shine. But it's sorta sideways and will need a little help finding its way when the time comes. In the meantime, this little guy is hanging on like a champ! I figure baby teeth earn interest over time, so I've warned my mother that this thing is going to be worth a fortune when it comes out, and I will be expecting some fat stacks under my pillow! 😆
My 25 hr old daughter still has a baby tooth as well. Her adult tooth is sideways in her lower jawbone and they said it would be too difficult to put in place. If her baby tooth went bad, she would need a replacement tooth.
Thx! My best laugh of the day!
😄🤣
I have 3 baby teeth, no teeth between my front upper teeth & my canines. I never have had or will have wisdom teeth. I'm 67 yrs old. The canines next to the front teeth appeared in myself & a brother & a sister. So 3 of us out of 8 have it. It's fun going to the dentist. They bring everyone in to see mt teeth. I'm a good teaching case.
I have a tooth where the normally inside pointing part is actually pointing out. I figure if I ever lose that one the tooth fairy needs to pay extra for the inside-out tooth. By the way, You say you are 50 years of age. I say you are a goddess. ❤️
I'm so happy this channel exists - simply learning. No clickbait, no exaggerations or yelling, just information. Amazing, thank you!
Amen
Also, no ads, annoying music, or distracting sound effects/visuals!
What about the open-mouth thumbnail?
This
Amen to that
OH MY GOD THANK YOU! people always say im weird because everyone has their own 'smell' - i have a very sensitive nose combined with a sensory processing disorder, and apparently people cant smell other people?? like, i know who's approaching me from behind because of smell. good to know im not insane lol
I can tell people by smell too, but doing it from any distance depends on a variety of factors, such as air flow. Glad I'm not the only one with scent-based superpowers, LOL. Are you ever able to tell other things by smell? I tend to notice pheremones once I've become familiar with someone's particular scent, so I can sometimes tell what sort of mood they're in (if it has an endocritic expression; ie, a correlated hormone or pheremone. Kind of hard to tell someone's depressed by the scent alone)
@@lordbalthosadinferni4384 ive never thought about that before! with people im very close with/have known for a long time, i think i can- but its not very strong to me lol. its weird that there isnt more smell-orientated people 😅
no i smell everyone ur not crazy
Your out of odor
@@greghelgeson1842 Eeeyyyyyyy
I think our personal smell still serves an important purpose: it allows our animals to better identify us
That reminds me of that chilling line from the show "V" years ago, when the kids says "You are not my mother.....you smell different"....
Strangely, I really can smell the difference between people. I hate the smell of people I do not know. It takes time for me to get used to the smells of people. But I hate being around them enough t get used to the smell.
That personal smell is also very important in romantic relationships.
@@angelbulldog4934 Though, I have never had a real girlfriend, I do not think my scent has played any factor in being considered heavily unattractive to the female of the species. I am immaculately clean for a male. Thus, scent can not possibly be the reason I am considered unattractive to the females. I believe it is simple. I am ugly from the neck up. Nobody wants an ugly mate, nor even an ugly friend. This describes me as unfavourable for both amicable and amorous relationships.
@@indridcold8433 me too. I don’t really know how to explain it but everyone smells different and it like matches their personalities (???)
My butt hair theory is that it helps against chaffing. As a girl with thick thighs that are hairless I can say that skin chafing from friction is actually utterly painful.
I don't think it helps with chaffing at all
Oh, man, chub rub. I feel your pain. Men's boxer-briefs are perfect to wear under a skirt to prevent chub rub if you can't wear tights or leggings
The best thing to do is trim it short but not too much, it feels nice to the eye touch and still performing its functions.
@@keriddunk1520 It does help with rimming, being a giver or reciever it saves on chaffing of the tongue.
People weren't meant to be fat, that's why.
So many different Hanks
I'm wondering if this is a mash-up of previously uploaded bits, it made for this video 🧐
@@zlaynie Most of their content is mashups of existing content and new content
Hank.0 x 10⁷
@@zlaynie i’ve notice that their ~30 minutes videos are compilations of similar topics vids
Hola macakiux t amo ahre
Hank flexing on us about how he hasn't died or failed to breed
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Sus comment
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At 7 (in the late 70's before sonars) they took out my appendix just to realise it was extremely healthy and I was still in really bad pain. They sent my appendix home with me in a bottle, I wasn't too impressed. After a x-ray taken they saw I had two huge cysts on my ovary. I can't remember how they treated it only that one nurse was extremely cruel and refused to bring a bed pan and forced me to walk. I can still remember the pain.
I always assumed butt hair was to help with friction reduction, scent dispersal and ventilation when sweating, passing gas and pooping. I've experimented with this theory a few times by after shaving the hair around my anus. Each time, I ended up devloping pimples between my cheeks, chafed badly, had a buildup of sweat between and at the bottom of my cheeks, had issues releasing gas since the scent bubble literally got trapped between my cheeks and had to roll up and out to escape (the popping of which I could feel on my lower back), and finally, I noticed that I produced much smellier, more forceful, and more audible gas. Regrowing my butt hair got rid of all of the above issues.
Alrighty then.
Thank you for your research.
You are a true goddess
I pluck my butt hair in odd moments. I've gotten used to it over time and I just focus on pulling as much as once after a twirl. It's friendlier than extensive shaving, which I feel at the gym.
How about adding dreadlocks to butthair? Just curious... And asking for a friend...
The butt hair video is surely the greatest intro of all time in the SciShow pantheon.
The classic scishow question: "why is there hair around my anus"
@@gokucrazy22 Around may be ok, it's when it grows in the cleft that you can have problems. I had to go through four excisions in two years because of Pilonidal disease. It took up to six weeks for the wound to close. During that time, I had to clean and change the dressing two to three times a day. Not a lot of fun.
agreed.
@@litojonny THE LEGEND
@@fr2ncm9 may God ease our journey insya'Allah
Two of my grandparents, grew a third set of teeth after they lost their "permanent" teeth. They were sparse and small, almost like baby teeth.
That’s really cool!
I had a great uncle who also had this. About the time wisdom teeth grow in he get a few new front teeth.
that is horrifying
I've got a full set(4 teeth), "below" my wisdom teeth, technically kept behind and back by them. I had one of my wisdom teeth pulled and a new tooth grew in, kinda freaked me out because my dentist, who had spotted them on the x-rays, hadn't told me they were there.
@@rhonafenwick5643 No, they have both passed on.
My theory about our vestigial remaining areas of scant body hair is that it usually is found around openings into our inner bodies… with the exception of underarm hair which simply was left in a protected area . .. my idea is that it served as a sort of deterrent to harmful disease carrying flies and insects and helped to protect our vulnerable body openings .
My understanding of why humans still have body hair is to feel parasitic bugs crawling/landing on us before they are able to bite. Thus protecting us from diseases transmitted by them.
"why do we have butts? it might sound like a cheeky question" " so why would evolution grant us such an ass-et" ooh them puns xd
So we can walk upright . Duuuh Ever seen a monkey with fat but? Glutes help you walk upright ‼️👍🤣
So THIS is why my butt hurts after a long hike or a desperate sprint to catch my bus?? This explains everything. Including, I guess, why so many guys have complemented my butt. I walk everywhere.
@@icarusbinns3156 Didn't he say in the video that butts help you with running but not so much with walking ?
@@revenga01 and hiking
@@revenga01 May be why I walk like a pregnant penguin..,,, and run like I'm in a all out track meet 👀😂😂😂😂
Unfortunately, I've always had too much fluid and wax buildup in my ears. Ironically, my doctors have instructed me to actually use qtips to wick up fluid and remove excess wax-though they taught me safety techniques so that I wouldn't endanger my ears in any way. So, that age old never use a qtip thing isn't universal, but does require some safety training under a doctor's care to make sure that you're doing it right. Most folks don't require it at all.
Dude your doctors are morons. It’s been well known for a while qtips are horrible for your ears. They were never designed for ear wax. They were designed for cleaning the outer ear not inside
And I can say this because I deal with chronic excessive wax, no ENT would ever recommend using qtips to clean out ear wax
@@briantannenbaum8110 not everybody has insurance you know
Same, if I didn't clean my ears I wouldn't be able to hear. Everyone on the internet things they know better then our doctors though.
Same. If I skip cleaning them a day or 2 the clear/very light yellow liquid wax will turn amber-colored and become hard and crusty. So its easier to just clean it every day, focusing mostly on the canal entrance.
The doctor removed my appendix during surgery that was for something completely different. He said he removed it as a "precautionary measure." It REALLY upset me!!!
That's really messed up, especially if there wasn't a risk to your health by keeping it there!
Did they explain tho? Did they see signs of inflammation and then said "Aw snap, this patient is gonna be RIGHT back here within days if we don't remove this" or something like that?
@@wendyleeconnelly2939 I don't know! Desi needs to come back and let us know
@@wendyleeconnelly2939 No, he didn't. It was a healthy appendix. In my opinion, VERY unprofessional for removing it.
I would sue.
"Even though its a cheeky question..." why is dad humor giving me so much joy these days?
Whoever takes on the mission of studying butt hair.... I salute you! There should be a nobel prize just for doing this research xD
They have something called the Ignobel Prize for unusual scientific discoveries.
My first proctologist remmove my long (5-7) inches of hair hanging from my butt hole. It would always get covered in poop and hang in the toilet bowel water.
Perhaps a university butt hair department.
@@johnmccoy8058 💀😶
I don't know but it's gana stink.
The answer to butt hair is #3 for chaffing. A process I have done is to shave only 1 side of the area at a given time, which removes excess hair from a single side with zero downsides, if done properly. The next time, (a week or so later), I shave the other side with the same results and keep the hair shorter and more manageable. If both get shaved at the same time there are many problems, mostly related to sweat as the skin cannot breathe. So, only clear one side at a time because you need SOME hair down there to counteract sweating, getting rashes, and chaffing.
This dedication is alarming.
As a former cancer patient, chaffing 100% is the answer. I lost most of my body hair during my my second round of chemo and I have been telling everyone for years how much we take butt hair for granted. With no ventilation all moisture in that area stayed in that area, leaving each step feeling like two buttered hams sliding past each other. This quickly led to irritation, and a stomach wrenching odor. Be glad for your butt hair!!!
I have very little butt hair. The hair I have is very fine. My ass constantly smells due to sweat and I do get rashes quite frequently. However, I also liked theory #2 - animals and smell. A lot of animals greet each other by sniffing butts. What if we used to be butt sniffers too??
hey! thanks, man, serious.
Laser hair remove for butt hair is best
0:33 Earwax 3:12 Baby teeth 5:40: crooked teeth 8:36 Appendix 11:22 🍑 14:10 👹🍑 15:44 Body odor 18:10 “Useless” structures (goosebumps, reflex pilomotor, tailbone, wisdom teeth) 21:26: nictating membrane 🤯🦅
Ahhhh. My favourite form of entertainment....science and comedy. Thank you.
"Big butts are uniquely human" Me who has no butt: I guess I'm an alien 👽
They forgot the elephants
@Only The truth interesting observation.
Does this explain my lack of running ability? I thought it was the cookies....
@Only The truth man's speaking only the truth
@@emperortgp2424 well being an athlete would build that specific muscle as well, and there's also foot shape and height that a big contributers
Nice to see the legacy of litojonny :’) truly a legend
The true legend of this channel
thanks mate!
@@litojonny *thank YOU* for relentlessly pursuing an answer to this question - never occurred to me to ask - fascinating now to know - or at least have some good reasonable theories
@@litojonny ayy its you
@@litojonny THE LEGEND HAS PROVIDED US WITH THEIR PRESENCE
When I got my permanent front tooth knocked out by a baseball, I grew another one! The dentist said I had another set and that it was a rare thing but there were more people with a third set than they realized. If it didn't happen to me, I wouldn't believe it either!
Q-tips are actually fine as long as you don't push into the ear canal. I use them to scrape lightly around the edges, putting a little pressure on to the canal as possible. You can still remove a decent amount of superfluous material without pushing it further in. The problem is, your instinct is to just drive it further in and start scraping, and most people don't even know where to stop in the first place. So really, it's better just to tell people don't do it at all. Massaging the space between your ear and your jaw/cheekbones and wiggling your jaw around can help break up a blockage. Holding your breath and blowing or sucking can also help to move material around and eventually drain into the sinuses. A warm moist rag over the ear may also be helpful. You can try using fluids. Warm water or even air can help somewhat, but can be unpleasant, and if you're careless, could be harmful to the ear drum. I've seen mixed opinions on hydrogen peroxide. On one hand, it's excellent at eating ear wax and can absolutely clear a blockage. On the other hand, it's highly corrossive, and will dissolve any biological matter it can. Giving that unfettered access to the inside of your face can be obviously problematic. I've seen first hand where a kid's eye started bleeding moments after recieving H202 through the ear. He turned out fine, but it was definitely a brick-shitting moment.
Well said.
The appendix is basically an external hard drive and/or a system restart for your intestines. It stores a backup of the essential operating system and any major updates it may have learned. If your (intestinal) system gets wiped, the appendix can attempt to restore it to a previous functioning state.
Loved this video. For butt hair: we as human have (generally) hair around sensitive areas that we need to keep for reproduction, like genitals, or "body holes" that are susceptible/sensitive to environmental harm. For example head hair to avoid damage from sunlight incidence, nostrils hair to retain airborne pathogens and allergens, eyelashes for the same reasons and eye protection, hair in the ear canal or microvilli for protection as well as the same functions as nostrils, etc. Butt hair evolutionarily may have emerged for preventing small insects and other little animals to get into our body (as we were not wearing clothes/underwear thousands of years ago). Many insects and small coprophages are attracted to 💩 and humidity, so the hair can get them entangled and prevent them to keep going in ;)
interesting maybe like other mammals we didnt have a tail to cover it?
Ya i do agree...it can be one of the possibilities...
now thats a proper answer!
How big are these other animals to get up into your butt?
@@lordeverybody872 You better keep it respectful. This is a channel for science and learning.
17:30 I run a lot (10ks, marathons, ultras). If I shave down under, the chaffing gets much worse. So I don't shave. I can trim though, but not that much. In addition, if I'll run above 1 hour, I need vaseline, and tight fitting shorts. Yes, evolution made us into long distance runners, but only for the most motivated hunters: "to chafe or to starve, that is the question"
I love the appendix. I am a scrub nurse in the NHS in the UK. I first started in the 90s where appendicitis was a young person(4- 20) disease. Over the past 30 years it has moved through the generations and is now very common in the elder generation. I learned about the appendix upgrade from a vestigial organ to now, where it is thought to have a minor part in digestion. I suppose that the human body has to cope with our ever changing diet. I love the beauty op the human abdominal cavity. I has its own life. The colours are stunning. Yellows, pink, purple(ok so this is not something that any Surgeon would like to see). I find it amazing to actually see the peristaltic motion of piece of the small bowel. I actually recently saw Meckel’s Diverticulum, a first in 30 years of being a nurse. I’m still learning loads.
Interesting. I wonder just what it is about diet that has shifted the age issue with appendicitis. My mother had to have her appendix removed in her early seventies, as a side effect her life-long gluten intolerance also went with it. wtf?
Your job sounds really interesting and you clearly enjoy it very much. I thought a diverticulum was just a 'bend' in the large intestine. I know I could just Google it but I thought I would give you the pleasure of putting me right and maybe even throwing in something interesting.
@@michaellavery4899 Hmm, no; a diverticulum is a kind of pouch that forms in the wall of the, usually, large-intestine, rather akin to a tyre inner-tube would bulge through a gap in a tyre-wall. Your 'bend' would, under normal circumstances, be referred to as a flexure, but that can under certain conditions result in a strangulation of the bowel. Of course, in other scenarios and professions a 'bend' would in laymans terms be a knot. Then there are conditions such as intussusception, with is an entirely different bowel situation, and thats not something to be taken lightly, although in some cases it can spontaneously resolve.
@@bikerfirefarter7280 Thanks for taking the time to explain and educate me further. There have been numerous times, when talking to nurses who work in specialist wards, have I been blown away by the depth of their knowledge about many fields of medicine. I had a friend who studied nursing and went straight into care homes. I studied mainly biochemical science but even he reluctantly agreed that I knew more about anatomy and physiology than he did. Incidentally, since reading your comment I saw a video about diverticulitis and the myth that sufferers should avoid nuts and seeds.
My second daughter had her wisdom teeth taken out and she had a teeny, tiny extra one in the roof of her mouth. So she actually had 5 wisdom teeth. I guess that made her smarter in the long run.
I had a wisdom tooth removed because it causes headaches. Got an X-ray before the surgery and learned I really only have that one single wisdom tooth. I'm definitely not a wise person lol.
I had a 5 pronged tooth wisdom caused me problems
U do know “wisdom” teeth don’t actually have anything to do with intelligence, right?? Lol
@@MerkhVision i think they’re kidding around about that hahaha
I have an extra tooth (if there were more it would look like a third set of teeth) under the middle of my bottom jaw. It isn’t completely formed which means if it ever pushes on the other it will have to be surgically removed from below
I grew a 3rd set of teeth, got around a dozen in a jar somewhere that i kept after the op. My mum said it was 'cos i was special, now i think i'm a freak. Cheers Scishow
Let your freak flag fly, proud and high.
Ur special :D
There's a known thing called "hyperdontia" that sounds like that.
I’d say you’re lucky. Extra tooth fairy money.
Do you have Cherokee ancestry? Some are known for growing extra adult teeth besides the usual wisdom teeth.
My 24 year old daughter, born in 1998 has no wisdom teeth! I was so jealous! I had to have all 4 of mine removed! This was such neat information! Thank you!
I'm 24 and all 4 wisdom teeth grew in great. As a kid I chewed a lot of hard food and so I got a wide jaw to accommodate all the wisdom teeth. My sister had to get hers removed as she ate soft foods and had a slimmer jaw
Wisdom comes late for some
Check her father and his family tree. My brother, sister, and I don't have wisdom teeth and some adult teeth through our mother and her father.
I’m thankful for my neanderthal genes that allowed me to keep my wisdoms
I'm 20 and till now i don't have any wisdom teeth, hopefully it never comes out 🥺
I havent really watched this show in years but coming back to it feels like old times. You guys are the best at what you do, love it!
Intergluteal cleft is a sufficient replacement for coin slot
Pachinko!
@@tom23421 WHY WOULD YOU SAY THAT
Hoooh boy, this gonna be fun XD
@@lyrablack8621 It would take zero effort to not say that but they still did.
@@tom23421 Schonz
Hyraxes aren't rodents. They're actually relatives of elephants, dugongs and manatees. Weird, I know.
Phylogeny is weird, innit?
Am I dumb for not knowing what a Hyrax is?
@@mafic3351 They're kind of obscure to the general public but tend to get the attention of zoology nerds because they're interesting oddballs. Hyraxes are African mammals that kind of look like a huge rodent at first glance. They're actually relatives of elephants and manatees, essentially being a branch of the lineage that stayed the rather generic smallish furry mammal body plan instead of growing big and fairly hairless with specialized anatomy. They are fairly agile and there's documentary footage of them climbing and resting in trees (it's a circumstantial thing I think - they're not arboreal by nature - I think it's in an old Attenborough series). Plus, they're kind of cute which never hurts an animal's popularity.
They also have hooves and not claws.
yeah i caught it too, i dont get how they didnt catch it
Fun fact: Wisdom teeth are normally not pulled in a lot of countries. A dentist will pick a rear molar that's the most worn and pull those teeth instead. That allows the wisdom teeth to naturally come forward and the patient has new rear molars :) and the process is way less painful compared to getting impacted wisdom teeth cut out of your jaw. Unless the wisdom teeth are so impacted that they are cracked, there's really no reason to get them pulled. I had to threaten to report a US dentist to get him to pull 2 rear molars with failing fillings instead of cutting wisdom teeth out of my jaw. Those wisdom teeth came in beautifully after about a year.
Everyone knows that you're not supposed to clean your ears with q-tips, but everyone does it anyway because it feels so freaking good! Normal people won't understand this, but those of us who have been to prison and had to wait weeks and weeks and weeks to get money on your account just so you can buy some coffee and q-tips.... You learn to appreciate those little cottony buggers...
Watching Hank age gracefully is one of the joys of scishow.
Again SciShow crew, add the word "Compilation" in front of these combo videos from the past!
I'm just glad they don't have 8 ads. The cat one had that many and it put me off all their compilations
I love my wisdom teeth! When I was around 9 I had to remove four of my molars due to them lacking enamel. Instead of having a gap, my wisdom teeth filled it and I now have a full set of functional teeth! :D I see the wisdom teeth as a small backup.
That's pretty cool but annoying for most of the population lol
Wish I still had my wisdom teeth now, ( had to come out due to impaction) because I'm now missing a couple 2nd molars...
Ultimately isn't that the same thing lol? You had to remove 4 molars, while most people have to remove 4 wisdom teeth. They cancel out in a way
@@sadkritx6200 Yeah they sorta do. But my teeth problems had me go through 2 operations and I removed in total 4 permanent teeth and 7 child teeth, so that sucked. I already dealt with it so I'm happy about that.
This makes me think it would be better to preemptively remove the back molars instead of waiting until your wisdom teeth have been beating up your TMJ and face from the inside for ages
I was literally bored at work today and the question “why do we have butts” popped into my head. I opened my KZhead and this was in my recommended…
You forgot to add sharks have rows and rows of teeth which break off when attacking prey. They keep sliding up row after row to replace them for future captures of prey.
Are sharks fish? Or do they enjoy fishing?
tactical reloading shark teeths?
I think most people know that. I was much more interested in Elephants being able to grow 6 sets if needed. Just earlier today I found out that they don't get cancer and now I find out if I was an elephant I could've replaced my two missing teeth and never had to go through a horrendously painful root canal for a third.
@@inkdreams5113 both
@@inkdreams5113 Sharks are cartilaginous fish called _Chondrichthyes._ Other fish like trout, carp, bluegill, etc., are bony fish called _osteicthyes._ Actually, lampreys and hagfish (jawless fish) are actually fish as well. Wikipedia has a pretty good page on them all. Oh, and yes, sharks (except the sharks in _Finding Nemo_ ) do like to fish. Though for my tastes (pun NOT intended, truly), the Angler fish is the classiest fisher in the sea. She actually does fish. (And she provides for her male buried in her flesh.)
If you do a lot of bending and lifting and a lot of stabilising hefty, awkward objects you rapidly learn a major function of your gluteus maximus. The amount of strain that it supports when your legs aren't completely straightened is significant.
I have dry flakey earwax and I’ve always been very confused why people were grossed out by earwax, or had body odor. At least until i learned about earwax types
I’m one of those weirdos too! I don’t mind my powdery ears but sometimes I wish I had a smell like everyone else.
here's a weird new idea: earwax perfumes! lol, this eill give you the scent you wanted to have lol you can collect earwax from many people (beautiful men & women and average men &women), if dry, grind them up to powder, and if wet, let them dry then crush them. turn their powdered earwaxes to perfume by mixing them up in an unscented oil base. have them put on roll ons and choose your smell for the day...
I was always confused and horrified when I would see someone clean their ears and have a big old chunk of brown stuff come out. My ear wax is almost entirely clear most of the time and not much more viscous than water. Led to a lot of ear infections when I was a kid cuz it's not really doing much except for irritating me until I shake it out like swimmer's ear 😅
I went to my university’s student health in a panic one day because I suddenly couldn’t hear out of my right ear. It was just earwax! I was so embarrassed, but the nurse who flushed my ear told me it was super common.
I would guess that butt crack hair as well as axilla hair also help suppress the creation of anaerobic environments in body folds by allowing air in between the strands of hair. Anyone who has ever worked around inactive and morbidly obese people can tell you just how much fun those folds can be when they cook long enough without any air circulation.
there goes my lunch.
Same holds true for armpit hair. Just after shaving, the sweat smells worse because of the tight airless seal the skin creates, but at the same time it is much easier to wash it off instantly and dry quickly, also anripersperants work better. So it isn't worth shaving too often, but having the hairs short rather than long is beneficial
Rude!
Oh gahhh
0:29 earwax 2:57 baby teeth 5:40 crooked teeth 8:35 appendix 11:20 butts 14:10 butt hair 18:10 vestigial structures
Were all here for the butts
thanks.
THANK YOUUUUU
Hero.
Ingenius
These intellectual people have so many interesting matters to discuss, I never thought I needed answer to all of these questions...you guys have gained a humble subscriber, well done and thanks!
What I can share about butthair is that it makes farting much louder if you dont have. Like when you blow some air by pushing your mouth into your arm vs. into a hairy head... So maybe it was a silencer :D
Or, it's a filter...
Yeah man All the hairless butt people got eaten by wolves because they were too loud when they were walking through the forest.
@@Amocles farting while walking through the forest 🌳
If you fart in a forest and a wolf isn't around to hear it, does it still make a noise?
I suppose human hunters (only humans have obscuring but cheeks that can produce such audible flatulence) would often alert their prey if their farts were audible. Butt-hair presumably & reasonably does suppress the resonance of flatulence for moderately sized butts.
I'm definitely a very mature adult as I giggled every time "butt hair" was mentioned
That's so immature........ 🤭🤭 Ok, ok, I laughed, too.
I’m fortunate to have enough room in my mouth for my wisdom teeth. I’m also fortunate to still have my appendix.
My cousin was lucky enough to be born without any wisdom teeth so had no need for removal
How much do you want for it? The appendix?
I got a cookie for you
@@samuelpena3195 Ill offer 2 cookies
Sad for me because at the age of 11 I had to have it removed because of some kind of infection in my stomach which almost had me. It had caused me so much pain, that even moving my body from left to right while laying on bed was so painful. I wasn't able to walk too since the pain was so much. I felt hard like a rock. Though when I reached the hospital, I had to use a wheelchair. That is someone pushing me of course. But after that, the surgeons called for an Emergency operation and was saved and still saved from what could have been my death.
So I'm watching this and keep getting dejavù listening to this guy. I finally figured it out, he does crash course on you tube. I watched all of his videos while I was in nursing school. Helped me understand what I was learning the most! Love hank!
Fascinating and delivered in a very amusing way. As always. Thank you!
So my obsessive gum chewing as a kid is the reason why all my wisdom teeth grew in without impacting? Sweet!
Lucky af
Same!
I was an intense chewer as a kid, gum, pens, pencils, really anything I could chew on. My wisdom teeth grew in perfectly straight, not impacted.
My appendix was my friend, then it tried to kill me. I broke up with it. Then I got a stomach ulcer from that one namey thing you mentioned... Ah, life. What a ride.
Appendices are our friends, but how we treat IT, makes US a bad or good friend. It's the body's garbage pail and if it gets full from ...well, CRAP we're eating and ingesting like nail biting, spoking, alcohol and other toxins like shots and such, it will overflow then need to be removed.....
@@Jennifer-gr7hn I was 14..?
I had a pilonidal cyst while I was in the army, being a typical soldier I didn’t want to go to sick call, be told it was nothing, and then be accused of “shamming” when I got back to the unit with a “return to duty” sick slip. But it was a bump right at the top of my butt crack, a little to the right, and it *ITCHED* when I had to sit for long times (driving in convoys, classes, etc.) I’d press on it and a watery pinkish fluid would come out, though when it itched it was more opaque and yellowish. It never once hurt. Anyway, this went on for a year or 2, until one night we were on the way back from the rifle range and I was sitting on the wooden troop seat in a 2 1/2 ton truck. My cyst itched like never before, and it was pure murder having to sit around cleaning weapons, turn them in, and wait for everyone to get done. Finally everything was clean, we had formation, and were released. I went right to my room to take a shower before bed, but first I started pressing and poking at the cyst. Foot on the toilet seat, bent forward, standing straight, leaning to one side or the other, trying every position I could think of to press from a different angle. All of a sudden I felt a POP, a flow, and sweet relief. In my hand was what I assume was a mix of hair, blood, dead skin cells, sebum, dirt, etc. It was a couple inches long and actually looked a little like an earthworm. This was about 25 years ago and it’s never come back. I still have a dimple where it was, though. Watching Dr. Pimple Popper has told me the sac was still in there but it’s never grown back.
I'm a professional soccer referee, which means I run an average of 200 miles a week as part of my job. I started shaving my butt and legs about 2 years ago, and have noticed no changes to chafing around the cheeks, but there was definitely an increase in thigh chafing.
When I was 14 I had my tonsils removed due to a investigation why I had an immune response resulting in a "cold" inflammation in my joints. I had in that time mild throat inflammation in my throat and they've said my tonsils must go because they might be the underlying cause of the whole thing. Years later they have discovered I have an autoimmune disease called Bechterew (aka Ankylosing Spondylitis) doe to a antibody called HLA-B27. Since then I am much more susceptive to viral or bacterial infections because my first line of defence in my throat has been removed. Removing the tonsils is still a very common practice where I am from (Hungary). I am worried that many more young people will suffer the consequences in later life without knowing how vital this organ is or was to them. I am now 44 and need to keep a close eye on what I eat or think twice if I washed my hands before taking any food because the very next thing I notice is having a diarrhoea or runny nose. My defence has been compromised by well educated doctors believing this organ can be removed without a price to pay.
I'm legit and genuinely sorry you've been affected by your removal, and your example is a great argument as to why we shouldn't, but I am also a great example to argue that sometimes it should be done
@@happyfacefries Surely there are reasons the removal is beneficial overall. For example an acute inflammation of the tonsils which being too close to the brain can pose a real risk for further and more serious complications. Or can also inflame the pericardium (the thin layer the heart is covered with). But to think some organs like the tonsils or the appendix have so little reason to be in your body is the wrong way of thinking. There is always a trade off. Luckily the body is very good at adopting to challenges.
@@Lucky32Luke I agree with that. If it doesn't need to be removed, don't bother, lol. I still have my wisdom teeth because my dentist said he wants me to keep them and try to take care of them, that my mouth is big enough for them. You are 100% right. Just because you think you don't need it doesn't mean it's not important. Kind of reminds me of the accident Egyptians scraping out the brain when mummifying 😣 lol
Had my tonsil removed in my late 30's and wished I had as a kid. No more choking, infections, tonsil stones and chronic illnesses
Kidneys & liver
Here’s a question: if everyone had a unique scent based on their microbiomes and stuff, does that mean identical twins will smell the same too, or are the microbiomes more responsible for the smell, which I assume could develop differently in twins considering it’s more about what kinds of bacteria are favored because of their diets?
Identical twins should still have different scents. While their genes may be the same their gene expression(some genes can turn on and off) can be different, their diets are different, and then of course there is the microbiome. Even something like mood and stress level should be able to influence it thru hormones.
i'm guessing sweat smells differently based on diet as well.
@@Sith90lord Absolutely. Eat a bunch of garlic and ask your friends.
My dog is a trained man trail dog and while it was more challenging at first for her to get to the correct family member, after few tries and errors she got it right, mums, siblings and twins be damned. So yeah, they definitely smell differently, but a family resemblance seems to remain.
I’d be interested to see the results of this. Simple. Find a set of identical twins separated at birth and adopted by families in different geographical regions.
On the subject of wisdom teeth and jaw size: I have always speculated that the my family’s larger jaw size may have something to do with our diet. I grew up on a cattle ranch in Montana in the Eighties and Nineties, and let me tell you there were some lean years. We grew our own vegetables and ate the cattle that were too injured to save. There were some REALLY good steaks, and also some incredibly tough ones. The veggies were sometimes terrific, sometimes stunted and woody. I recall a number of times that I paused eating, not because I wasn’t hungry , but because my jaw was too tired to continue chewing. Our family dentist insisted on pulling my lower wisdom teeth as soon as they crowned around age 19. (Like my father, I never developed upper wisdom teeth or adult eye teeth). Now, I occasionally cut up my lower gums because of the lack of matching molars. I have to chew with an underbite to match molars in the back of my mouth. On a side note, I still resent my dentist for insisting on pulling my oversized baby eye teeth so he could replace them with virtually identical implants. I have to floss after every meal to remove the food particles that accumulate under the implant caps.
On butt hair: As someone who once shaved my butt hair, I have experience as to the differences between having and not having it. One reason is that it prevents small chunks from getting too far if you fart. The other, and the main reason I stopped shaving, is that the hair traps sweat. If you don't have it the sweat runs down your legs which is super gross and annoying. It's also a pain if you don't keep it shaved due to chafing. The reason I started shaving it was curiosity and I noticed it did make it far easier to clean after pooping.
Haha, I have no words. You go you.....
My experience: As hair goes down, chance swamp ass goes up!
I can just imagine the ancient, pre modern man pick up lines: "damn girl! You hunt with that ass?!" 😆
Actually women wouldnt be hunting they would be gathering
@@skylarwalls3227 Women were also known to hunt.
@@skylarwalls3227 the 2007 kids book is not a reliable source.
I regret shaving my butt hair when I was a teen. Those newly growing butt hair were prickly as all hell!
I actually went through six rounds of very expensive, laser hair removal in the cleft area because I was prone to Pilonidal problems.
What about all the compliments you got on how tidy things were?
Nut hairs too
@@fr2ncm9 how expensive we talking?
Hair removal cream is the way to go for that
Speaking of butts and chasing down prey to exhaustion, I saw an Australian documentary on feral cats and the Aborigines that decided to make them food. I was impressed by this rather hefty woman chasing a feral cat, then finally walking over to it and just picking the exhausted thing up. This is now how I catch my dogs when they're avoiding their bath.
That's awful! How could you watch that if you are an animal lover. Or maybe you don't like your dogs either
@@mread958 Read up on all the destruction feral cats cause, and you might feel differently. As for the aborigine, she was just adapting, theirs is traditionally a hunter-gatherer lifestyle, and who are we to criticize that? And I don't eat my dogs after bathing them.
🤣🤣
I saw that documentary , I loved it , they got some exercise while getting dinner while saving the native wildlife . Hat trick !
😂 I don’t have ad-free KZhead but it’s turned out to be hilarious sometimes. I just experienced one of the best ever! Show host says: “I wanna talk a little bit about butts, because -“ Buick ad interrupts: “That’s a really tight spot…” Me: 💀
It’s obvious that the reason we have butt cheeks is to provide an audible biohazard alarm.
Make it clap! 🍑
it's more the hole that makes the sound...not the cheeks. Horses' cheeks don't touch and then can machine gun pretty well
Funny
11:57 gives new meaning to the phrase smart ass
13:15 vid: "humans are the only primates who can run long distance" me who always sit: 😮
Years fly by, but the heart stays in the same place.
Video: You don't see other species and go 'gee that beaver's teeth should be straighter...' Me, an animal science student: Gets flashbacks to the dentistry unit of horse class, in which we learned that horse braces are in fact a thing that exists...
Maybe because horses are involved in shows? They get inspected and poked and prodded when being judged, so that's just a thought. That said, I sure as hell wouldn't want to be the one putting them on. Because you know that whomever is the last person that horse sees before anesthesia is going to be the first person he'll try to stomp the crap out of when he wakes up!!!
Pfft everyone knows horses aren't real, ha! 😁
@@bridgetsclama Actually, it's because their teeth grow continuously, so if they're crooked, they don't wear evenly and some parts will turn sharp and poke at the horse's lips and require frequent filing by horse dentists
I owned a rat with a crooked tooth, he needed it shaved down every few months. You would think an animal with only four teeth would be less prone to mistakes.
@@bedtimeat8 Are you implying rats only have 4 teeth? Because they definitely have more than that. Each side of each jaw has 3 molars as well, so 12 total molars, plus 4 incisors =16 teeth. We just don't see their molars because they're so far back in the mouth, and they lack canines or premolars.
2:52 Stopped using cotton swabs, after realizing a Phillips screwdriver works better to get rid of the itch. These days I use ear spoons out of surgical steel. ... Either those or banging my head against the next concrete wall till I -loose conscious.- Edit: lose consciousness. I shouldn't be posting in a foreign language half asleep from a mobile device. It always ends badly grammar wise. @Matt thanks for the correction.
Lose consciousness
@@SalfordMatt I bet he's still unconscious
@@annettebonteri3234 Yeah, barely.
About the earwax problem: I have used the "q-tip" method my whole life and never had a problem with it. My mother and wife OTOH used the flushing bladder with liquid or went to the doctor to fix thr problem. Both of these methods ended in fiasco, with the situation worse. Of course eventually it was (sometimes partly) fixed, but not without pain and time. As I said I have never had a problem, maybe a clogged ear 2 - 3 times in my life. Now I don't do this often maybe one time a week or more often less than that. Btw, I never push the earwax IN, I position the tip max in without touching the sides of the earcanal and then "scrape" the sides of the canal in a spiral movement out.
My heart beats for you every day. I am inspired by you every minute, and I worry about you every second. It is wonderful to have you in my life.
SciShow knew we’ve all had that question about butt hair…
"We've all had that question about, "But, hair?"
with a staight face
The question I never knew I had, yet was successful in peaking my interest enough to click & watch a video about it. I can't wait to casually slip the topic into casual conversation.
@@jewals-healingrose222 Hair produces sebum, or oil, which prevents two layers of skin that are constantly rubbing each other from developing rashes or even open wounds from the heavy friction in otherwise dark and enclosed spaces. You might think hair is a poor lubricant, but it works wonders. Hairs provide lubrication and are also tiny, slender log-like rollers that let the two skins glide back and forth over each other with minimal impact. Obviously, your butt cheeks slide back and forth and even high-five each other your whole life. Hair in this region helps immensely with reducing friction to minimize pain, discomfort and potential abrasions to the skin which could allow bad bacteria to infest as well as increasing random air flow between the two. Our DNA doesn't know we have powders for this now, but we've only recently had alternatives.
@@vinsanity1976 LOL 😂 I appreciate you taking the time to give an explanation. Even though I was already very familiar with the science of it, it just reminded me again of the wonderful enlightening talks I gave to some unsuspecting family members. I thoroughly enjoy random topics. I found it quite entertaining to bring it up in casual conversation on a few separate occasions this last week. I go into far too much detail when explaining it to others, but I find that it is half the fun. The conversations even took some interesting turns. Favor be with you, my fellow lover of knowledge. 🖤
Species like beavers and groundhogs constantly grow teeth.
Crocodiles too
@Set End ... Snakes and Sharks as well too!! ♠💯
The host summer was too short every second deserves to be loved.
Appreciation is the highest form of prayer, for it acknowledges the presence of good wherever you shine the light of your thankful thoughts.
I've learned so much from Hank Green and crew over the years. I'd proffer one small correction: nic·ti·tat·ing membrane instead of nic·tat·ing.
What length of fingernails is actually usefull and when does it get cosmetic?
more than 1/4 inch of white is just extra
@@psor9983 When you can't pick your nose without drawing blood, they're too long.
18:13 So cool of them to let Hank's little brother do the last segment!
I might have seen this before, or I might have seen most of the older videos featured in this compilation. Regardless, this was perfect to listen to and intermittently watch while I did a couple of tedious chores. I love this channel.
11:22 "Why do we have butts. It might seem like a cheeky question, but...". I died.
You had me at "butt hair". Thanks SciShow!
If you keep a good track of what your ear wax is doing and you insert the q tip without pushing Then you can gently twist it around and scrape off ear wax around it and then pull it out without ever pushing it back in. that's not impossible to do. It's not only messy, but it will get on anything that you use around your ears, like headphones.
"You're a really good actor absolutely love old-school Hanks narration 👌❤️ also personally got wisdom teeth, but I also got hella lucky, as they sitting vertically inside my lower jawbone & skull. They're not going anywhere. Although, since I'm missing 4 of my adult teeth (thanks Klinefelters), I could probably use them.
I think reducing chafing is the most likely answer for butt hair. Keep in mind that chafing can also occur when wiping, which historically might've been done with less soft objects such as wood, rocks, and shells.
Shells huh
Mate if I was a pre history human there's no way in hell I'd wipe with mf'ing W O O D. Plants exist
Sage brush, corn cobs, or just plain poke a hole in a large leaf with your finger and wipe, then use the leaf to clean your finger(so I hear) you may also try doggie style. Suggest learning from any dog name "scooter"
One time my friends dad accidentally wiped himself with poison ivy!!! Oouucchhhhh
EWWWWWW!!!!!!!
Earwax makes sense. Wisdom teeth make sense. Ass hair doesn’t make sense.
For all we know it could literally do nothing. The genes for something entirely unrelated might control it for all we know
what sense does the hair make on your head? It's more strange that we lost most of our body hair, unlike other primates
@@psor9983 our lost body hair is likely tied to more efficient sweating and our preferred hunting method. Never stop running and just literally run our prey to death. Humans as a species don't run fast but we run so so long distance and just don't stop much like wolves. But even compared to wolves we are even better at cooling off during long term physical effort. But so much hair just on our head that's odd, maybe a way to thermoregulate as in it can keep our heads and hence the blood in our brains warmer or cooler based on how we cut it for our environment
@@Never_heart I have a theory that Humans were indeed selectively bred/domesticated by someone or something. The only animals who have hair that never stops growing are animals that were domesticated by humans i.e. horse mane/tail, long haired cats/dogs, sheep, domesticated llamas/alpacas etc. Human hair on our head will continually grow long as well. Every other mammal has hair that grows only a certain length. Wild horses and dogs don't have hair that keeps growing long. Orangutans have long hair but their hair seems to stop at a certain length and doesn't get matted together. Meanwhile a shih tzu dog's hair will grow and grow into big dread locks. So I also think that humans lost body hair due to selective breeding somehow
@@psor9983 have you ever grown your hair out? Because at a certain point it does stop, to get it to grow more you need to actively trim the dead hair to stimulate growth. We are no different to other mammals that way, there is a max where it will only grow so long to before slowing almost completely to the point that you will only see minor growth after multiple years
My favourite vestigial structure is not in humans, but in snakes! My pet ball python still has vestigial legs, and I think that's so cool!
This was fun, thanks!
Just a detail i wanna clarify here (Because creationists love to misrepresent it) Vestigial means that a structure has lost its original purpose. It does not, however, mean that the structure is useless. Things like the appendix fulfill a purpose, just no longer their original ones.
And in some cases, we're not entirely sure what function vestigial traits perform. Although the current function of some vestigial traits is not exactly vital, such as with the appendix. Then there are other traits that still perform their original function, but also serve another purpose in modern humans.
Misrepresented? How?
@@paulplatt2622 Well, creationists like to pretend like vestigial structures have to be useless, otherwise they don't count. This discounts 90% of vestigial structures, as most of them do, in fact, have some purpose.
@@Chrischi3TutorialLPs everything has a purpose, we just might not understand what purpose it has.... and yes i believe we were created not an accident....
@@paulplatt2622 See, this is exactly the difference between science and faith. Scientists look at the world around them and draw their conclusions from there, even if they don't like the results. Creationists have a set world view from an ancient book full of inaccuracies, fallacies, and contradictions, and pick the evidence that supports their thesis. And whenever they find something they cannot refute with that method, they chuck it up to essentially magic, either by just saying "God did it" or by saying "God works in mysterious ways", whichever one happens to fit better.
Funny thing: my teeth are too small for my jaw and are crooked because of having too much space 🤷🏻♀️
I can see that in your profile thumbnail.
2 different genes
Hi everyone, concerning the "Butt Hair", from my own experience, after having undergone several chemotherapy treatments and like most of the people who have experienced this, I lost all the hair on my body...when I started to walk again and before all the hair grew everywhere, I had irritations in the parts that are not exposed to the sun and where the skin rubbed agains skin (I needed to use some medical cream)... so in my opinion: theory nb.3 is the right answer
I was really lucky to have naturally straight teeth. All my highschool friends had to get braces, and some people didn't believe me when I told then I never had braces myself. But, y'know, I'm one of the many people who needed to have their wisdom teeth removed. Something seemingly went wrong during the healing process and it had my gums recede in the far bottom left corner of my mouth, which exposed a hole below my last molar. I had my wisdom teeth removed in 2008 at age 18 - I had to get several fillings on that molar because of food getting stuck in that exposed gap, until I had to get root canal surgery. Worst dental experience EVER. But it didn't end there. The pain persisted because root canal surgery doesn't actually kill sensation to the tooth. In 2016, the tooth broke while I was eating (eating RICE, of all things). I had to go and get it repaired, which was expensive, and they put a crown on it. Lost the crown. Tooth broke again. They put another crown. It didn't help. By 2020 or something, I had had enough. I went to the dentist and told them to pull the tooh. They still tried to convince me to get another crown, but I knew they just wanted my money, so I put my foot down and said NO. Pull the goddamn tooth. From getting my wisdom teeth removed at age 18, I'm now 32 and have 31 teeth. The pain is gone and the rest of my teeth have fortunately shown no sign of shifting. tl;dr Teeth are frickin' weird but please take care of them, and make sure to find reputable and trustworthy dental professionals.
The reason we have butt hair is the same reason we have other hair. To increase the evaporation surface when we sweat. That was concluded a long time ago. Head hair insulates against heat stroke and only get sweaty when it hot or we work out which makes it slightly different than body hair.
Your sweaty ass theory doesn't really hold up.
I've once shaved my Butt Hair and I can vouch for reason no.3. It does help to reduce friction and rashes when you walk, especially in summer when you sweat a lot. NEVER EVER GONNA SHAVE MY BUTT HAIR. THEY ARE PRECIOUS
Totally agree with you! I love my butt hair!
You give me hope ❤️
Why did you do that? 🤣
Why did you do that? 🤣
How do you know the shaving not cause the issue
Equally informative and entertaining. Nice balance.
this adventure into my bodys strange things was fun . I learnt a lot. thanks.