How Mammal Jaw Bones Evolved into Ears

[@RockinHorea]

Jeholbaatar - great name for a fallen rodent warrior with muscular jaws

[@HoopyFroodood]

It's not a rodent brah. But yeah, cool name.

[@Preuen-zs1fz]

Sounds like a mongol warrior

[@eugenetswong]

...or a Biblical name: "Behold! It is Jeholbataar, the son of Johoshaphat, the son Asha!". It works as a name in a fantasy story, too.

[@lizg2153]

For the record, (wasn’t it Jeholbaatar) “baatar” means hero in Mongolian so, agreed

[@RockinHorea]

@@lizg2153I looked it up, and indeed that is the etymology! The name is misspelled at 2:27 but I corrected mine, thanks :)

[@angeliquea9557]

You ever miss what was said in a movie cos of your popcorn chewing? Even with your mouth closed lol.

[@eljanrimsa5843]

Time to evolve!

[@angeliquea9557]

Eljan Rimsa 😂

[@sonnyg960]

Yes 🤓

[@lepidotos]

your body conducts internal sounds into your ears

[@AbramSF]

No wonder that whole lollipop tunes thing worked so well. That was awesome. Edit: sound bites lollipops. They play music in your mouth and when your teeth touched it you could hear the music really well. Must be because the jaw is so connected to your ears.

[@joyestik8835]

Oh, kind of like those electric toothbrushes that played music while you brushed

[@TheChickenRiceBowl]

I've never heard of these. No pun intended.

[@GcorpCoPrez]

Merodiya I remember those commercials, they were called Tooth tunes. *shudder* those commercials were so cringy.

[@strider04]

That's not why its because of the vibrations are so close to our heads and biting down means that we have a tighter grip and so can feel the vibrations

[@Master_Therion]

There are two parts to today's video: Ears and HIV. Combine them and you have "hearing aids."

[@kendomyers]

*nods in approval Well done sir

[@makerhappy6718]

Christopher Judge: Indeed.

[@ElTurbinado]

🍻

[@cannedmusic]

Or maybe the Jeholbaarar was the first to properly masticate.

[@Ferroes]

Stop listening to AIDS - anti-Bohemian rhapsody man

[@timsullivan4566]

JEHOLBAATAR 1: "Hey bro, these berries taste awesome - check 'em out!" (He STUFFS a few berries into his buddy's EARS and awaits his reaction) JEHOLBAATAR 1: "So... whaddaya think?" JEHOLBAATAR 2: "Sounds awesome"

[@erinm7645]

Butt is legs Shoulder is arm Now... Ears is jaw bone

[@ShutItKyle]

Erin McCreery Jaw is ears

[@fullmetalpleb]

I've played enough Spore to say this is correct

[@Monody512]

Your butt is just your leg shoulders.

[@zimtak6418]

Ass is face ...or so I was taught in grade school.

[@wanderingbufoon]

Were all just assholes that grew limbs that did stuff

[@mikamekaze]

These ears are made for chewing. And that's just what they'll do One of these days they'll hear But for now they will just chew

[@stiffcost]

Gold

[@outdoorsy01]

I seriously thought the title meant this mammal allowed others to chew their ears. Ear Bob, are u hungry? Bob: Yes mate. Dave: wanna chew?

[@sarahleonard7309]

The book Your Inner Fish has a whole chapter dedicated to the possible reason for the jaw bones becoming ear bones. It's an informative and entertaining book in general, in my opinion.

[@baranorak4080]

2:29 Just admit that you tried it yourself

[@duhduhvesta]

Baran Orak legit couldn’t figure it out

[@comd4609]

Wow ypu got me

[@masterofpureawesome]

Yeah...

[@SupersuMC]

Yup.

[@Pegasys22]

I'm an ex Jehovah's Witness,, literally, ALL I could hear was "Jahovahtar!" and flinched every time. And that, to me, it sounds like some kind of vengeful transformer robot ready to dispense indiscriminate Jesus. Which is equally as unsettling. This has been a strange video for me.

[@slappy8941]

Thou hast been naughty, and Robo-Jesus comest to smite thee, in his mercy.

[@sdfkjgh]

James Hindley: Great, now I can't stop thinking about the original StarCraft Siege Tank pilots being really aggressively Jesus freaks. "I'm about to drop the hammer...and lay down some indiscriminate Jesus!" Grid-square clearing using nothing but Watchtower mortars.

[@patrss]

SAME!!!! I was gonna comment something similar lol omg that video was so triggering! Basically I have no idea what the video was about, coz all I could focus on was "Jehovahtar"!

[@phoenixdavida8987]

@@patrss lol to all of you!

[@JLocke573]

@@slappy8941 Give thanks that He is kind enough to come down from heaven and kick thine ass!

[@Weirdoid]

Here is something to try, take a metal rack or similar item. Tap it. Tip your ear close to it and tap it. Then rest your chin on it and tap. You hear it loudest through your jaw. So jaw bones becoming ear bones makes perfect sense to me.

[@Iisa1010]

this makes me happy and gives me back some motivation. I visited the area of the Jehol Biota and I am also working on (inner) ears of mammals (or rather beavers).

[@phoenixdavida8987]

Awesome

[@NovelNovelist]

"...to hear over the sound of it's own gnashing." I have a huge problem with that! I frickin' can't hear when I'm eating and have to crank up whatever I'm watching.

[@calamityjean1525]

Did he say "gnashing" or "noshing"? "Noshing" is Yiddish for "snacking". Is Hank Jewish?

[@Emily18184]

This video: the 3 middle ear bones are why we have such great hearing! Me, who has tympanosclerosis, booing: sure, maybe for you! I'm not really bitter, I just think it's funny that the middle ear bones are *supposed* to improve our hearing but my body said "screw that" and now I'm HOH

[@arjunafuerza1305]

I love your new hair cut . Seriously .

[@craigh5236]

I also love new flavors in my ear

[@Exoneos]

Hawk Green should do some ASMR stuff his voice is relaxing also it helps me to pronounce correctly english words.

[@teawrecks1243]

everybody gangsta till the mammal says "chew"

[@Iceman-kr6df]

Hey, I can wiggle my jaw back and forth, and primates with a mainly vegetarian diet certainly do quite a bit of chewing so it might not be too far fetched that the same thing evolved the same way for the same reason

[@siyacer]

When the discovery is so new it doesn't even have a Wikipedia page.

[@mightyone3737]

Probably not actually related, but this really reminds me of the fact that horses occasionally grow teeth in their ears... then I found out they can grow them the same way almost anywhere. Still wild though!

[@kendomyers]

Thats why I shove food in my ear canal

[@adm0iii]

I agree. We should all shove food in your ear canal.

[@kendomyers]

@@adm0iii :D

[@line-mariefortier2629]

And mine is full of pure and delicious honey . Do you taste a bit???

[@kendomyers]

@@line-mariefortier2629 Amazing!

[@harrymallory7963]

The theory Ive always heard put forward was the chewing aspect. mamalformes and mammals themselves improved the food processing bit at the start of the process with chewing so that dinner was already softened up before it got to the stomach, taking less time and energy off the back end to provide for a more continuous feeding for us, rather than sitting around waiting for our stomachs to clear before going back out on a food search. The reason for that was that as endotherms, we needed to fuel ourselves on a more regular basis in order to maintain that metabolism that allows us to keep a regular body temperature. Chewing and processing our food up front requires more robust jaws, it is said, less smaller bones, so the quadrate and that other small bone...whatever its called, migrated to happily fulfil a happy evolutionary co-incidence and whatnot.

[@harrymallory7963]

Oh, and this was going on way before the critter featured in this video was around. As soon as some forms of reptiles adopted the synapsid condition; the antorbital fenestre, additional jaw muscles could be employed to work the jaw so that it not only had better biting power, it could be employed to do more than that. Creatures like Dimetrodon, a pre-dinosaur reptile, an ancient relative of mamalformes, was particularly noted for its dentiary differentiation which already showed that the jaw was going to do more in the coming times, than just snap at things.

[@SigmoidalDisposition]

Shout out from Botswana 🇧🇼

[@jakkaljakobie8774]

I thought the title meant that the ears chewed on prey. Like ok evolution, why would you make such a tiny adorable horror machine?

[@jakethomason5495]

You lookin fit for this time of year.

[@zanka53]

That hoodie is pretty dope

[@line-mariefortier2629]

Seriously, this show is very interesting. I wrote any words to laugh but excuse me...I'm old but young in my brain. THANKS FOR ALL OF US.

[@Jade-g6p]

Only ten babies in the control group? I wish they'd had more. Wait. No, no I don't.

[@VanaeCavae]

Could you do video about mammals and other animals that once existed on antarctica before it froze.

[@Jade-g6p]

I take it you like Antarctica?

[@VanaeCavae]

@@Jade-g6p like Antartica ? No, no, no my dear friend. I AM Antarctica.😄.

[@evelynsnyder5866]

PBS eons did one I believe. That's their sister channel.

[@brandonmonroe9822]

Love the hair cut!

[@spindash64]

Kinda surreal to think about how recent an invention external ears are

[@icollectstories5702]

Are you a geologist or astronomer??😁 Me. I'm happy to live after the development of flowers.

[@adambagshaw4070]

We need to move our ears higher up so we can hear Netflix over eating chips

[@erikeriks]

My ears are also built to chew

[@SuperLoops]

the inner ear bones of mammals are traceable right back to devonian fish jaw components

[@dumoulin11]

Thinking about babies who are born HIV positive has completely taken the oumf out of me. I could just cry right now.

[@Someone-ll1rc]

* Shoves lunch in ears *

[@whatabouttheearth]

Hyomandibular (in Eustenoptheron, Panderichthys, Tiktaalik, Acanthostega) to Quadrate to Stapes

[@malachipash3824]

Looks good

[@trevinbeattie4888]

I have to admit, when you said "the little guy's really cute" I thought at first you were talking about your own ears. (You do have cute ears.) ;)

[@jamesallen4447]

Hearing enabled predators to more easily locate prey and helped the better adapted prey to escape being eaten.

[@carlosnino6143]

Can you do a video on tipler cylinders

[@ZagrosŞêxbizin]

Please don’t use misleading titles. Use honest clear titles we will watch your stuff anyway ( its good )

[@sunnyd9884]

"We don't chew the same way they did" SURE but have you ever been eating a bag of chips and had to put volume on your computer obscenely high just to hear what your watching? Maybe it had to do with that

[@Keallei]

SunnyD so much this. I’ve had to rewind so many times because of a not even that loud crunch.

[@sangbryan6028]

Not what I expected, but yay science... Good day

[@phoenixdavida8987]

Agreed! ;)

[@Arthera0]

Wait something is off with hank and i am not sure what xD

[@leonidas0242]

It's the hoody, and he isn't as energetic as usual

[@jokuvaan5175]

I think it's the shorter hair

[@Yamaazaka]

Yah idk

[@Arthera0]

@@jokuvaan5175 I think that is it. i went back and he did get a haircut but for some reason it just jumped at me

[@kendomyers]

I think he gained weight and has a different haircut

[@JoeD250]

Nice calender but I like the one from Kurzgesagt more. May be next time.

[@theforgottenbrawlers]

Year 12,020 brother

[@15Bravo]

These mammals ears will chew! And thats just what they'll do! These mammals ears will chew all over you!

[@IuliusPsicofactum]

The bone of the year!

[@JayQuickster]

Damn I thought learning philosophy was impressive from Hank... Then i seen him running another channel... then another. Now this? Hahah Who needs school, Hanks got everything covered

[@natebelt9800]

We love your show!!!

[@kendomyers]

Do you?

[@natebelt9800]

Morty Sanchez informative and nicely put together!

[@Decoratif06]

No one: French people: Bone jaw

[@rolfbjorn9937]

Non. bonjour et bone jaw with a bad french accent are still far. And French people pronounce bonjour... properly dude!

[@line-mariefortier2629]

GOOD! BONJOUR!

[@tomf3150]

Rolf Bjorn En effet.

[@BrianBakerCA]

Did we use to have whiskers? Could those bones be from feeling vibrations in the air with whiskers? Genuinely curious I hope it’s not a stupid question lol

[@iloveprivacy8167]

How long does it take to diagnose a newborn with HIV? Are they waiting for that certainty, or presuming it in the interests of speed? (If the latter: what are the risks to HIV-negative babies?)

[@MBicknell]

I get how the end outcome is advantages but how do the steps in the middle make sense

[@pierreabbat6157]

Martillo, yunque, estribo! It's called the stapes (stirrup) when it's of genus 1 (from a blood vessel growing through it), and the columella when it's of genus 0. Are the animals which have a stapes the same ones that have three bones in the middle ear?

[@Lorefumbilus]

We watched one of your videos in science

[@v-gc7257]

Ears built chew. Chew ear

[@PaulKentSkates]

Are downvotes down from creationists?

[@kendomyers]

Worse anti-masticators They reject the notion of chewing and drink their food from tubes like foie gras geese

[@adm0iii]

Slurpies! They want to force children in school cafeterias to slurp!

[@dynamicworlds1]

Probably people that have been downvoting every scishow video ever since scishow told the truth about sex being bimodal instead of binary. (Also creationists)

[@mosquitobight]

Now that you mention it, downvotes do seem to be down from earlier videos. Maybe the anti-science idiots are giving up.

[@ts25679]

Malleus pronounced like mallet for which it was named

[@crackedemerald4930]

These boots are made for barking.

[@christiancecere9590]

hank change your hoodie

[@duhduhvesta]

How did they chew?

[@paulbennett7021]

Big fan & longtime subscriber. But please, use the term 'bug' correctly.

[@jenni8200]

I thought using antivirals on neonates was already known??? I've been working in obgyn for 16 years and we've always given the first dose of azt within 24 hours of birth

[@icollectstories5702]

Um, did you have a control group? That might be the difference. I haven't read the study (and don't plan to) but perhaps they were using newer or cheaper drugs. But it's good to hear standard practice is worthwhile.

[@jenni8200]

@@icollectstories5702 we didn't do the research on it, it was a protocol already in place.. Tbh I thought this was standard practice

[@icollectstories5702]

@@jenni8200 The necessity for a positive test makes this sound like a need-based system. Hopefully the study results will enable the administration of a first dose before test results are available.

[@jenni8200]

@@icollectstories5702 neonates do not show positive hiv testing that quickly. We give it to neonates with hiv positive mothers

[@_mortiam]

About the lunar phase calendar... what's wrong with september? There are 31 moon phase images distributed over 30 days ....?

[@crackedemerald4930]

3:22 the WHO?

[@adm0iii]

They have doctors.

[@FenrizNNN]

3:23 who?

[@MdJahid-zj8qt]

Its necessary to show speech in writing for foreigners

[@corifraser1255]

Regime and regimen are different words.

[@danielmclaughlin5573]

Space. With as many presidents as Space goes through in so short a time, it sounds a very dangerous place to get involved in politics...

[@seventyfive7597]

So, after witnessing the news on this clip, am I a Jeholbaatar witness?

[@icollectstories5702]

If so, you are very old. Tell me 'bout the dinos!

[@devinm.6149]

It looked like it was holding a bow in the thumbnail (why is it called that).

[@QuadroMemes]

Nice haircut

[@davidsan9654]

If I was president of space, I'd be soo happy.

[@rqzzlldqzzls]

snazzy hankcut

[@TheGuruNetOn]

Bataar is Mongolian for Warrior.

[@stevevernon1978]

i only want to be vice-president of the moon. not all of space! is there a place for me on Patreon?

[@candycemonroe7345]

LoL

[@jamesharmer9293]

Nice haircut!

[@audrey2658]

also if you lose teeth your bones in your ears will shift and make it harder to hear

[@nathanj.2645]

Did that new species tech us anything about how butt evolved to legs?

[@ne0ge047]

Lay off the cheetos Hank...or wash your hands

[@KellyClowers]

Multi tu BEARR cu lates 😂

[@wanderingbufoon]

Lemme just taste sounds

[@susanhuntley9262]

Yikes these captions

[@artexfyne8122]

Maybe the WHO should suggest people dont sleep around... wait why wouldnt they push that idea?

[@jeffreywickens3379]

Wow, you made it through an entire video, without turning it into a global warming propaganda piece. Congratulations.👍

[@dnyaneshwarsandhan9221]

Nice videos.. India

[@VariantAEC]

So naturally and as per usual: I wanna know how well that HIV positive kidney did in the HIV negative recipients?

[@NASTEfilms]

What kind of prenatal treatment did these women get before the babies were born?

[@joewhite6868]

Jawbones became something as complex as ears because . . . magic I guess?

[@5heeshi]

Did you not watch the video, it was to move out the way of eating. I would love to fly, maybe if I keoe jumping out of my window and create an 'evolutionary pressure' I will evolve wings....

[@joewhite6868]

@Big Back - I was mocking the idea that DNA is prescient.

[@ThaRemo]

is ear jaw?

[@Keallei]

ThaRemo well, since butt is legs...

[@fanOmry]

Then just have the change standard to all Mothers with the virus. Logistics? Really?

[@alittlebithailey5994]

They were pretty successful......until they died

[@lamegoldfish6736]

What?

[@moldoveanu8]

Whatever happened to survival of the fittest now that medicine keeps alive even those most unfit to live? Not sure if that's efficient or best ethical use of resources and long term consequences for those people to reproduce knowingly that their offspring will suffer and face many challenges not indicative of a normal life. In ancient Sparta those unfit for a normal life would be left to die and the parents would just try again if they themselves were even healthy to begin with. We don't do that anymore and as a result the whole world is becoming weaker, more frail and with tons more problems. Is that ethical? Probably something for societies to reconsider. At what point does helping everyone stay alive, becomes worse than letting nature take over? Just a philosophical thought. You(whoever reads this) get no right to get mad about these statements. They are all fair questions.

[@HoopyFroodood]

September didn't look right on the lunar calendar, there should've been another day. You can see how the moons overlap the lines.

[@bcjmythical9576]

So basically, treatment for HIV needs to be done to newborns a few weeks from birth... One like for one SAO fan that was reminded of Yukki!

[@fuduzan5562]

Man, I really don't like the title changes you guys do on your videos. I get that it's a bid to keep the clicks rolling, but the original title was more interesting and less clickbait-y, and I was interested in watching before you changed the title.