How Do Marine Mammals Hold Their Breath For So Long?

[@emmythepixi]

Fun Fact: This video did more than just teach people about aquatic mammals. It taught me more about myself. I have a congenital bone marrow defect called DBA that reduces my bone marrow's ability to produce hemoglobin. I've always noticed that I sigh a lot and people think that I'm sad or moody, but to me it's just part of my normal breathing pattern, and now I know why! My brain is just telling me to take a deep breath to get more oxygen! It's so cool to learn something about my own physiology that I never knew before...

[@naota3k]

DFTBA

[@hamzazaman8382]

i didn't have fun :(

[@thomasrichardson5425]

Wow that's really interesting!

[@metalmishap]

I read it hemogoblin. Im sorry you dont make enough hemogoblins.

[@emmythepixi]

I wish I had EXTRA homogoblins so we could have a fabulous goblin party

[@ApocalypticBlades]

>if you are waiting for the day humans can stay underwater without equipment, *dont* *hold* *your* *breath* dislikes unsubscribes throws phones out window kills self

[@kelechi9854]

Rest in RIP Chasen Tom ????-2016 You will be missed m8😿

[@mookie4959]

>greentexting on youtube

[@ablone]

+Antoseb Rest in Peace in Peace?😂

[@ablone]

+Bruce Wayne Rest in Rest in Peace??😂

[@NvrchFotia]

RIP pieces in peperonis m9

[@gavincaesar3999]

his face when he maid that pun.

[@boxindaw5932]

it scared me too 2:38

[@gavincaesar3999]

***** holy shit I just realized that lol.

[@patana256]

maid

[@bryanwan6169]

Ugh, that pun didn't hold water.

[@Zoot101]

Looks like it made a splash, though.

[@jacobharris4207]

:(

[@supernaturalswampaids8083]

+Zoot101 Yes, no.

[@Waltham1892]

Hank's talent with puns comes and goes with the tide.

[@TheBen1202]

I'm a-boat to quit on this channel when you whale tell these puns

[@JPeakman96]

Why do our nipple get hard when we're cold?

[@NeroPiroman]

yes this should be avideo

[@thaton3guy100]

Google it

[@stardreamer8996]

@joe botsch All of sci shows videos could be answered by googling them. Videos are here for a quick source of information and so we don't waste time googling things or figuring out what to google.

[@teriyakichicken1848]

+Star Dreamers Quickly Google, or wait a whole week for a .00001% chance your answer will be question in an unnecessary 3 minute format. That's a hard one.

[@General12th]

To cut glass.

[@clarafitzgerald]

Liked for the "don't hold your breath" pun

[@GreerFried]

I was thinking of disliking for that.

[@burt591]

+Greer Fried Why? it was a good joke

[@naota3k]

It was a good joke, if today is the first time you've properly understood the English language, and the way you learned English was from late 1980s sitcoms on public television.

[@burt591]

naota3k Actually my English is not too good, so maybe I'm missing something. So what's wrong? What am I missing?

[@naota3k]

burt591 You're not missing anything. It's just unsophisticated humor.

[@lifenoggin]

s/o to the cuvier's beaked whale. you're the true hero.

[@anthonyvelezvaldez7280]

AHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHHlife noogin i wuv u

[@mlgesuschrist5518]

Life Noggin is my true hero

[@Anthonyist]

omg I never get to see people I am subbed to comment! Are you subscribed to Scishow too?

[@daniellbondad6670]

Oh hello blockman.So,in your morality video,has your animator successfully killed you with an eraser tool.

[@joeyopenshaw]

Didn't expect to see you here, Blocko!

[@grimfate]

the hemogoblins are stealing my oxygen!

[@profsolaire7558]

Only reasonable thing to do know is build a wall!

[@netserivry5561]

+Hose Bee we kinda already have that - our skin is effectively a wall around our bodies

[@theblackdeath357]

KomradeCPU dey took mer derb!

[@Teemonaut]

That pun was worth more than gold

[@andyharris3084]

Topic idea: What causes those coloured lights and foggy shapes you see when you close your eyes in a dark room?

[@ineffable0ne]

+1

[@susanblue3694]

GREAT IDEA

[@ahtzee9078]

Yeah. I see white mists floating around when my eyes are closed. And colorful stars. I'm not alone anymore.

[@deonlittle5320]

+Ahtzee Gaming stare at a light for 10 seconds lol makes it sooo much more intense

[@SeanGerike]

Yeah, I've always wondered that

[@FGDDD7]

That feel when breathing becomes a conscious effort. That feel when you check your collar isn't crooked.

[@gordontaylor2815]

2:39 BOO! (throws virtual tomato)

[@Flameandfireclan]

Pause the video at that exact moment. Your life will be fulfilled.

[@marcl.1346]

2:35 Build up 2:39 RELEASE THE PUNS 2:40 Im dying of laughter (and that face you made)

[@ZEbelgiumfreak]

Manual breathing activated!

[@bassingtheus2835]

+Grass I agree but not for you too

[@kira.jyints]

You are now blinking manually as well.

[@Rottensteam]

+CuzEyeCan Also you can now feel your tongue in your mouth.

[@jjbarajas5341]

Screw all you guys.

[@thomasparker9146]

Dammit I thought I was safe

[@ExtraAmpersand]

I was hoping for a bit more on the physiological structure, not just the blood. Like for example, the diaphragm (if there is one?), Muscle structure, etc. Great video as usual, by the way.

[@ExtraAmpersand]

Oddly enough, that started making me think about Bird's feet. I've read that branch dwelling birds have to flex their muscles in order to walk on a flat surface, and have to relax muscles in order to grip the branch. Curious if there's something similar in this case.

[@ryans9094]

people who dislike this.. do you just hate information? I mean, you can't be that ignorant to go onto a science channel just to dislike videos...

[@General12th]

Some people REALLY hate puns.

[@eddieozil21]

+Jordan Shank I personally love them. they're so lame and sometimes very clever which I guess is why it's so appealing to me

[@PaulMab9]

I like to think that it isn't the informative nature of the video that people dislike. I prefer to think that it was a stray click or, as the other guy said, some people really dislike puns.

[@adiyellamelli111]

Nice video Han'ks and Hank's team keep up the good work!!!!

[@adiyellamelli111]

*hank

[@6Twisted]

2:40 Dat laugh tho.

[@Waltham1892]

What was the porpoise of this video?

[@monkeyneil578]

whale it is to educate us

[@Waltham1892]

***** I think its a red herring.

[@boldjawad]

tortoise?

[@spidle2653]

To educate us why are you making such a whale about it

[@woodi101]

*Water* you think? Its in the title of the video... sheesh.

[@yetinother]

PUNS! ......and then *scariest Hank Green laugh ever on this channel* awesome!

[@ProGangstaShit]

SOMEONE, please make 2:41 a GIF meme

[@moviespoiler1137]

mammals found on the giant water vapour cloud around the black hole... aka the biggest water resevoir in space.

[@bryanwan6169]

rip-off lol

[@clintonjones955]

...HEY!!! ...you forgot to the 'pressure' enhancement of the deep dive that tends to conserve oxygen in 'state' ...PLUS the thermal reciprocity(?) ...PLUS the 'temporal' (dilation/contraction) discussed in quantum mechanics.

[@laurabowman9057]

I went with EPI to Pacuare and It is an amazing place to visit as well as do some research on all the various species of animals

[@mojo331]

That laugh doe.

[@burt591]

2:35 Lol good one

[@Ravid394]

LOL that was a funny one Hank at 2:33!

[@ben-l-6234]

I was taking a sip of water at 2:35 ; almost spit it out but then caught myself.

[@highspacefox]

Hank is the pun master, master of puns and punning. And thanks EPI! How does one work for such a noble organization? They should have a youtube channel, no?

[@edwinflames]

This video took my breath away.

[@callumsumpter2248]

I love that SciShow has started uploading more frequently, it's literally like everyday now.

[@lewismassie]

That pun was worth watching the entire video for

[@VideoNozoki]

When you made the pun-face, I have been conditioned (WheezyWaiter banjo face) was surprised there wasn't banjo music!

[@carchariasspartania3958]

Why would anyone thumbs down a video like this ? It baffles the mind.. O,o

[@smileyguy433]

2:40 literally made it my home screen! This is my favorite youtube channel!

[@peytonpelletier660]

Thank you a million times for a super easy to understand explanation AND SOURCES?!? We're very spoiled hehe

[@connerrose6116]

That pun was awesome. A+

[@jenna478]

Anyone else just enjoy how Hank says hemoglobin and myoglobin?

[@reinarachiel]

This info is so breathtaking

[@lucudia]

That feel when SciShow mentions your little country :D

[@rigrentals5297]

I knew there was something special about Myoglobin other than saying it to make myself look smart in my nursing school LOL.

[@Bombay1618]

SciShow, please do one on Will-o'-the-wisps. I know its usually freshwater, not oceans, but they perplex me.

[@eften113]

Liked for that cheeky pun-laugh~

[@razrev4445]

HANK!!! FINALLY watching you after a good while you need to do more vids by yourself man

[@darksensei56]

2:40 my new favourite KZbin moment. Thank you Hank

[@anilchadha2429]

how they sleep ?

[@ganaraminukshuk0]

For dolphins, at least, they sleep with half their brains at a time.

[@ImbaBlackMamba]

+Ganaram Inukshuk just like most of humans

[@bobhope4288]

Like Flamingos?

[@scalpingsnake]

Hi my name is Brain .

[@pastelab]

Uni hemispherical sleeping

[@Heritagepostfarms]

Can you talk about how humans need oxygen, yet it is killing us at the same time.?

[@HelloWorld_42]

kzbin.info/www/bejne/jJ-kmXSObp17j5Y

[@SciShow]

kzbin.info/www/bejne/jJ-kmXSObp17j5Y You got it!

[@ErlendAnderson]

Since many people smoke, do a video on what changes take place in your body while smoking a cigarette and why those changes happen.

[@Heritagepostfarms]

SciShow Now THAT'S service!!

[@vishishify]

how can you not like Hank Green?

[@blaze556922]

Jump to 30 seconds in on all these sci sho vids. That is when they actually start.

[@crowofrevelry]

i'd appreciate a video on what happens when you dislocate a joint and what you can do to recover from it. I'm pretty sure a lot of your viewerbase will find it useful and fascinating, as well.

[@endergirl4827]

I love this guy, that smile with the puns

[@RyanMayer]

I can't express the amount of appreciation I have for simply just being a human.I don't take this for granted. I'm too stupid to figure out everything that you guys share, but am competent (and interested) enough to grasp it all, as you all put it in so lovingly layman's terms. As our species is really on top of the food chain, we can share info such as this on a medium like this. Pretty fackin' cool if ya ask me. Sure there's other amazing animals that do really cool stuff... However, I'm pretty sure they won't reply here. (y)

[@Ghostxprt]

Fix your collar!!!!! lool

[@quietmadness1]

You go SciShow! Congrats on getting a Science and Ecological sponsor!

[@VoMFilms]

my like for the pun! Long live puns! Destroy the stigma against them! Lets rise up!

[@woihjsd]

Hahaha that pun-chuckle! love it :)

[@theBabyDead]

2:39 , the creepiest moment of Mr. Hank Green. Ever.

[@TildaM1994]

Your face after that pun omg XD you looked like my nephew when he was still little and someone made a fart joke. Very cute haha

[@thomasrichardson5425]

that chuckle at the end

[@verdatum]

Neat question, and neat sponsor! You guys really seem to pick sponsors well.

[@DreamAznAngl]

What a coincidence! 'm taking my marine mammal biology final tomorrow 8am. :P

[@bryanwan6169]

Have you told these mammals about that giant amount of water in that quasar in space?

[@nathanaelbreuer9554]

This helps explain part of the Wim Hoff method.

[@rck1000]

Meanwhile I can't hold my breath for even a minute! Thanks Hank :) It's always great to find out about more ways to help protect our sea and its inhabitants

[@samlund8543]

BREATH Haha, got ya TO BREATH, didn't I?

[@bryanwan6169]

not to be the grammar police or anything *BREATHE

[@pranaynair8611]

+Cryp Tic that's not grammar that's spelling.....

[@samlund8543]

+Cryp Tic yeah i thought I wrong but I didn't care. I still made you do it, didn't I?

[@channelofsindre]

2:37 Good advice

[@PuskarJoshi]

OMG ! Hank Green seeing first time him out of volgbrothers channel

[@dbuck5350]

I guess you meant that these large, diving sea mammals have "proportionately more" hemoglobin and myoglobin than humans, rather than just more.

[@SuperNovaPL]

SciShow heres the question: If we ever meet aliens will their maths be same as ours? Video about that would be pretty damn cool

[@moviespoiler1137]

haemoglobin*

[@snaaail]

*hemoglobin

[@FGDDD7]

*homogoblin

[@Jesusm0042]

/hetrogoblin

[@kelechi9854]

*greengoblin

[@ganaraminukshuk0]

*goblinsfrommars

[@1503nemanja]

Cuvier's beaked whales also hold the record for deepest dive among mammals, 3km down which is just crazy. Whales are such amazing and beautiful creatures in every way, I am enraged that Japan's whale hunting is allowed by others.

[@adamant4107]

Longest a Human has held their breath underwater was 24 min 3.45 secs. _Aleix Segura Vendrell (Spain), in Barcelona, Spain, on 28 February 2016._ That's still pretty amazing!

[@plcflame]

How does these animals sleep? In turns of 30 minutes? Strange think about a whale that drowned.

[@SoggyNanner]

If I'm not mistaken they basically sleep with one half of their brain at a time.

[@Wizarth]

From what I understand about dolphins (for example), they only sleep with half their brain at a time, which gives them enough cognitive ability to continue rising to the surface, taking breaths, and submerging again.

[@KaosKrusher]

at least someone who DOES (or at least tries to since I myself don't know and didn't bother to search for it yet) explain the "half-brain" part (cause a lots of comments I red are saying they use half their brain but that alone doesn't answer the question as the brain never really shuts down while sleeping (hence dreams/nightmares or sleepwalking)) so thank you mister

[@jacktumbleweed]

The term is "unihemispheric slow-wave sleep" and it basically lets half of the brain rest and "recharge" while the other half remains at full cognitive function. Several dolphins and whales take advantage of this as well as a number of birds (Peregrine Falcon, Common Blackbird, domestic Chicken, and several others).

[@rowleyj31]

Off topic, but killer whales will kill their pray on by drowning them sometimes. Basically how they hunt for young whales.

[@mattystewart8]

It amazes me how animals that breath air evolved to live in the first place. Like how in the hell did that take place??

[@zoegardiner9614]

i love this channel

[@yusufhrj]

Aleix : "i got world record holding breath for 24 minutes!" David : "i got it since 2008 for 17 minutes" Tom Cruise : "i can hold it for 6 minutes, not bad for an actor" This whale : "you guys are getting scored?"

[@silentgoomba5089]

his face at 2:40 scared me so bad.

[@Njumkiy]

i liked the laugh after the pun

[@PureZOOKS]

2:40 looping gif of this, now.

[@jameserickson3477]

Don't hold your breath? That's terrible. Keep up the good work!

[@DysnomiaFilms]

Those whales could watch 2001: A Space Odyssey before coming up for air, assuming they skipped the intermission and overture.

[@BongoJibi]

What about the mammalian dive reflex? Talk about that as a main adaptation of sea mammals #SciShow

[@BadgerUKvideo]

awesome question

Can you guys make a video on the physiology of human freediving?

[@DavidHogg1]

New show idea SciShow Oceanography

[@mauriciorosashernandez6332]

Please do a video on how to hold your breath longer

[@tahirul8578]

2:40 might need to wait half a second but keep replaying puns!!!!

[@phantasm1234]

Can you do one on Cerebral aneurysms?

[@jamiemarcelle6394]

that pun made me hit the like button

[@carsonrush3352]

They're getting close to the whole "humans breathing under water" thing, with something called the "Aquaman Particle". Look it up. It can store enormous amounts of oxygen in a minuscule amount of space, an example of which would be the oxygen content of an entire room being sucked into something the size of about a tablespoon. The problem that they're running into is that people aren't supposed to live on pure oxygen, and so until they find a way to absorb large amounts of nitrogen in a similar crystal they won't be able to make the mix of gases that we need. Still, they're getting close. ... Also, that previous example sounds like a Bond villain trap. "I've left you in this sealed room with a small pile of Aquaman crystals hidden somewhere, and you must find them before there is no more oxygen to breath. [queue the villainous laughter and walking away to leave him to his untimely demise, which he will escape from]".

[@diceman199]

They also move far more of their lung capacity. Humans change about 10% of the air in their lungs with each breath and whales go to about 90% so they are getting rid of much more CO2 each time.

[@DerMitWieWoOhneNamen]

That Pun-face killed me. xD Literally, I'm a zombie now. :|

[@callmeishmael3031]

Some seals actually sleep underwater, and of course, whales do.

[@briannn4754]

I'm liking this just because of the pun.

[@BlankBrain]

When Triton artificial gills come on the market, we still won't be able to breath underwater.

[@nicop2968]

New elements discovered after the formation of the Periodic table and what it means for our over-all understanding of the universe!!!

[@sanderm7432]

Laughed, must get out of my room..

[@itsjustblaze3489]

Evolution: instead of making these normal fishes im gonna make them swimming mammals.

[@mtolives]

that's an interesting video for sure but I would like to see an "add on" video about how marine mammals drink water. I know that its from their food but its seems like that is not enough water to sustain them.

[@MrLewooz]

don't hold you breath.........puns!!! You bloody (!) hilarious scientist!!!! ah ah!