9 Groundbreaking Discoveries About Sleep

  • Опубликовано:  4 месяца назад
  • There's a lot about sleep that we don't understand, like why we even sleep in the first place, for example. Here are some amazing discoveries biologists have made while trying to solve the mystery of sleep.

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    Brain activity

    Brain centers




    Blue light


  • КатегорииОбразование
  • Длительность: 10:35
  • Тэги для этого Видео:  SciShow  science  Hank  Green  education  learn  sleep  fatal familial insomnia  insomnia  thalamus  human body  health  memory  brain  rem  eeg  brain wave  constantin von economo  brain stem  hypothalamus  sleep science  biology  narcolepsy  chronic pain  fibromyalgia  sleep deprivation  blue light  wavelength  melatonin  light  astrocytes  spinal fluid  medicine  alzheimers  

Комментарии: 1 525

  • Salvator Merrifield
    Salvator Merrifield 2 дня назад

    why is that spot below his throat censored?

  • T.W. Someone
    T.W. Someone 4 дня назад

    talking without pauses is kinda difficult to listen to

  • kit ten
    kit ten 4 дня назад

    if this whole video is about sleep, why didnt you guys talk about too much sleep?

  • Issac Lumbard
    Issac Lumbard 7 дней назад

    What about sleeping too much?

  • WWZenaDo
    WWZenaDo 9 дней назад

    Ancient humans couldn't get much sleep - plagued by parasites & biting insects, uncomfortable nests or sleeping on branches, having to keep one eye open for tree-climbing predators (like leopards, pumas, snakes, etc.) - all of those survival issues meant they couldn't get a good night's sleep very often. Even cave dwellers had to deal with bugs, snakes, scorpions, etc.

  • WWZenaDo
    WWZenaDo 9 дней назад

    Oh, poor little rats...

  • cass c
    cass c 11 дней назад

    why have scientists been burning rats?? 😔

  • Mario Capistran
    Mario Capistran 14 дней назад

    nothing groundbeaking here

  • CindyMzLuciLulu
    CindyMzLuciLulu 15 дней назад

    Is too much sleep bad for you?

  • Reymart Abude
    Reymart Abude 20 дней назад

    I want to record my dream while im having a wet dream

  • kittcat223
    kittcat223 21 день назад

    I thought when I was a sleep my sole would. leave my body. -_- .?dose that really happen

  • kittcat223
    kittcat223 21 день назад

    I thought when I was a sleep my sole would. leave my body. -_- .?dose that really happen

  • Ryan Lundgren
    Ryan Lundgren 22 дня назад

    I fell asleep to this and i have ridiculous insomnia. hahah

  • Julia Gustepa
    Julia Gustepa 22 дня назад

    I sleep up to 10 hours per day and I'm very pain sensitive. I wish I could find out if I'm simply sleeping wrong or need even more.

  • Jahquan Russell
    Jahquan Russell 27 дней назад

    What's in my tears

  • cold Empress
    cold Empress 29 дней назад

    im watching this while not sleeping

  • Victor Rodriguez
    Victor Rodriguez 29 дней назад

    Is he seriously going to say scientists don't know why we have to sleep. Isn't it obvious?

  • Detailed Obscurity
    Detailed Obscurity 1 месяц назад

    People actually get paid to work in a lab electrocuting rodents.

  • Kitty Cat Kiss
    Kitty Cat Kiss 1 месяц назад

    Currently watching this at 4am.. (:

  • Trigon Playz
    Trigon Playz 1 месяц назад

    My uncle played angry birds epic 48 hrs straight.. he did not die YOU LIEED

  • The Trident Gamer
    The Trident Gamer 1 месяц назад

    Was the host wearing a TRIFORCE t-shirt?

  • James August
    James August 1 месяц назад

    after seeing the background pic at 6:05, insomnia may be a problem tonight.. Also, Uberman? Where does that fit? I read somewhere where people were on that schedule for 6 months+

  • Fresh M3
    Fresh M3 1 месяц назад

    Sleep = memory consolidation, and astrocytes cleaning out your brain because you know... the BBB is pretty tight. Generally everything else that you stated in this video is in response to this. Hopes this helps people that like facts. Sleep doesn't use a pain system, you have a little guy in your brain that paralyzes you PAG, Periaquaductal Gray I think (been a while since 1st year of medical school)... Everything uses the same pain system because it uses your pain fibers and your pain tract. Until you get into the CNS pain that you have to use weird things for... but I'm going on a tangent.... Memory consolidation, astrocytes. Just go with that and no one in science/medicine will ever question what you say.

    Edit: I just got to number 8.... and realized he said Astrocytes lol... Whoops...

  • Plum_ Pie
    Plum_ Pie 1 месяц назад

    whenever go hiking and i only get like 4gours of sleep in the forest i wake up feeling more rested then i wuld ahve if i was at hme gettig 8hours

  • Tha Spectator
    Tha Spectator 1 месяц назад

    Guys I'm very close to dying I got to sleep at 1:00 and wakeup at 5am. No wonder why I can't remember shit and I have Chronic Neck Pain. I'm going to sleep before it becomes my last time.
    *Good Night*

  • PrettyLittleArii
    PrettyLittleArii 1 месяц назад

    Lmao and im watching this video at 3am...

  • Tagger Tag
    Tagger Tag 1 месяц назад

    The horrible shit we humans did to animals for science.. We owe Rats in particular an apology. God will punish us all.

  • 3majsie maciek
    3majsie maciek 1 месяц назад

    10:05 Milking a cow!? Did I guessed it?

  • Kiwi Blood
    Kiwi Blood 1 месяц назад

    "-a region of the brain called the hippocampus."
    First thing I think of
    I actually didn't know we had hippocampi in our head.
    Hmm... I'm calling mine Rainbow.

  • Tsen Animation
    Tsen Animation 1 месяц назад

    my friend believed that his classmate can be awake for a month without sleeping

  • 8000 cats
    8000 cats 1 месяц назад

    Lmao, when I first clicked on this video, I thought it said "9 Groundbreaking Discoveries About SHEEP" Counting sheep lol?

  • Saadman Yasar
    Saadman Yasar 1 месяц назад

    Rats everywhere

  • jeaniebird
    jeaniebird 1 месяц назад

    I didn't sleep for 6 months straight, once. I went insane, eventually landing in the local loony bin. It was hell. Doctors never figured out, or never admitted, why. I'm positive it's because they kept trying new drugs on me and I just kept reacting badly. After 3 months I had to start refusing because I just couldn't take the side effects, anymore. 3 months after that, I finally slept... Hmm

  • jeaniebird
    jeaniebird 1 месяц назад

    I had to reschedule a back tattoo I had going once, because I didn't get any sleep the night before. It was ten times more painful than usual. After an hour, I just couldn't take it anymore. I was shocked how much of a difference that made.

  • Jon Lopez
    Jon Lopez 1 месяц назад


    if jmkjn

  • Beef Shishkabob
    Beef Shishkabob 1 месяц назад

    I don't understand how "we don't know why we sleep" but 30 seconds later he says we sleep so our body can rest. Isn't that the reason why we sleep? Someone please clarify

  • Christian Andrade
    Christian Andrade 1 месяц назад

    Why are we so mean to rats?

  • KarinARTS
    KarinARTS 1 месяц назад

    What's funny is that I'm watching this to force myself not to sleep.....

  • Turtletech Inc.
    Turtletech Inc. 1 месяц назад

    The hippocampus, where all your memories about hippos are stored

  • Entity 303
    Entity 303 1 месяц назад

    You can use blue light filter apps to use your phone during night without disrupting your sleep cycle.😀📱

  • 1 For The People
    1 For The People 1 месяц назад

    Good video! ?Could you please do a video about dishwashing? Sounds mundane I know, but my partner and I are having controversy over hand dishwashing vs dishwasher machine and the temperature of hot water. I say sterilizing hot water has to be at least 165degrees F in which you could not handwash dishes because it's too hot. However if you handwash the dishes with a good soap well, rinsed in cool water the dishes are just as clean if not better than in a dishwashing machine. Sterilizing dishes in a machine is OK but wouldn't you also have to keep them in a sterilized environment? Thank you for sharing. Keep up the good work.

  • bradOLF pittLER
    bradOLF pittLER 1 месяц назад

    it'd be hard to discover all of this stuff without animal testing.

  • Saleem Al-Agha
    Saleem Al-Agha 1 месяц назад

    i think wifi interferes with sleep

  • offspring
    offspring 2 месяца назад

    watching cat videos in the middle of the night?? meeen i did it sometimes

  • Elizabeth Shaw
    Elizabeth Shaw 2 месяца назад

    I have horrific iretractable chronic pain which is not fibromyalgia. it is exhausting and I need to take a nap in the afternoon and I need 10 hours sleep at night or the pain explodes beyond what I can stand.

  • alex parada
    alex parada 2 месяца назад

    I dont sleep cuz sleep is the cousin of death *thug life music and glasses then dies*

  • SirMan McDude
    SirMan McDude 2 месяца назад

    So being in non-REM sleep is where your brain files away and stores what it deems to be important while REM sleep is the brain saying "Fuck it, let's run some simulations 'cause we're bored"

  • LittleMissGamerGal
    LittleMissGamerGal 2 месяца назад

    Dont look at devices a few hours before bed... yet im watching this before bed. i wouldnt have learned that unless I was exposed to blue light now..

  • Fernando Alatorre
    Fernando Alatorre 2 месяца назад

    It seems to me a bit naive to say "we don't know why we sleep" and on the other hand being so certain about all of the counter effects of not sleeping. Could it not just be that your body does that (sleeps) so that those terrible, fatal counter effects don't happen? Could it not be that your body knows (in a very broad sense of the word) that those effects will occur and thus intends to prevent them by sleeping?

    I mean the guy in the video says, we don't know why we sleep... and then immediately after he says, a lack of sleep will literally kill you....

    So maybe we sleep so we don't die?

  • Private X
    Private X 2 месяца назад

    Ok. Good night.

  • ordinary Oddball
    ordinary Oddball 2 месяца назад

    I have f.lux on my PC and Night Shift on my iPhone, but I use my iPad the most in bed and it's old enough that it doesn't have a Night Shift. How do I make it do the orange light thing?

  • z9elka
    z9elka 2 месяца назад

    poor rats :(

  • Riste dzisev
    Riste dzisev 2 месяца назад

    Man youre crazy i sleep with lights on and my phone on a youtube playlist the whole night with 2 pillows and a giant blanket over my head. Its pretty comfortable and i would much rather have that than pitch black and quiet and listen to my ears rinning and think the monster from russian sleep experiment or the devil with no eyes and blood is staring at me waitting for me to move and shit my pants jesusCHRIST

  • Krishna Vma
    Krishna Vma 2 месяца назад

    Thank you for this. All my life I've been a chronic sleep avoider, seeing it as wasted time. My loved ones will be happy to hear that you have managed to convince me that sleep really is necessary and mandatory. Cheers! 🙂

  • Amazing Deep House
    Amazing Deep House 2 месяца назад

    the poor rats

  • lamp 81
    lamp 81 2 месяца назад

    I really had no idea that fibromyalgia was worsened by lack of sleep. It really does correspond to my pain levels when I cannot sleep and I cannot do much the next day due to pain and fuzzy brain and lack of motivation. This pain builds up if I do exercise during a bad a day and then keeps me awake the next night because I cannot find a comfortable position. So...if I can somehow sleep then I can feel better and break the cycle! Thanks for the info! I am going to have to stop looking at my phone in bed and just listen to audible or white noise and maybe magazines, catalogues or crossword puzzles, even though that means I leave a light while I am fall asleep. Ok, giving this a try. Amazing!

  • Out Of Place Ninja
    Out Of Place Ninja 2 месяца назад

    Wait, number six, there was somebody who purposely burned mice, then purposely deprived them of sleep for the purpose of "study"? Sounds like some areas of science is where the crazy people hide to stay out of trouble with society and the law lol.

  • Lin He
    Lin He 2 месяца назад

    Here I am, watching a YouTube video on my iPad right before bed time.

  • Sierra Miranda
    Sierra Miranda 2 месяца назад

    Don't we sleep because we're tired of doing shit all day???? I thought it as common sense

  • kidego3kgt
    kidego3kgt 2 месяца назад

    All those dead rats. RIP.

  • Bill Hampton
    Bill Hampton 2 месяца назад

    Anybody ever tried meth ? Holy fuck! , 80 hours without one wink of sleep . That shit is crazy I don't how people can keep doing that stuff .

  • IAmAgainst
    IAmAgainst 2 месяца назад

    Am I the only one thinking in the miserable life the rats in those studies had..?

  • Muscle Man
    Muscle Man 2 месяца назад

    where did you get your shirt?

    • Muscle Man
      Muscle Man 2 месяца назад

      it's pretty nice

  • Elena Sucec
    Elena Sucec 2 месяца назад

    Poor Rats they take so much @&$% so we don't have to. They definitely got the short end of the stick

  • Elena Sucec
    Elena Sucec 2 месяца назад

    Who else is procrastinateing sleep staying up late watching YouTube videos!

  • Eduardo Paulo
    Eduardo Paulo 2 месяца назад


  • EatenRibs i-si-u
    EatenRibs i-si-u 2 месяца назад

    " still running in the family* but they keep reproducing, such genes to protect ...

  • Jim McBride
    Jim McBride 2 месяца назад

    "Sleeplessness makes pain worse." Seems reason enough for getting sleep, fwiw

  • Dennis Jasperse
    Dennis Jasperse 2 месяца назад

    So how do you explain most of the time set the alarm clock and most of the time you wake up maybe 5 minutes early!!!!

  • Doug sillig
    Doug sillig 2 месяца назад

    is it just me or is Hank's voice a little raspy?

  • Notlehs Bulb
    Notlehs Bulb 2 месяца назад

    Anyone else watching at 3am?

  • Michael Carter
    Michael Carter 2 месяца назад

    Why are you fidgeting and using hand gestures so much? It's random; like your just fidgeting just to fidget. Plus it's annoying. until you can tone it down, in unsubscribing.

  • Mikael Durbin
    Mikael Durbin 2 месяца назад

    My wife and two children have FFI. This mutation is trying to take everything I love. Is there any breakthroughs anywhere? Vanderbilt didn't have a clue what we were even talking about. The dr didn't even take the time to google it

  • spartanace13
    spartanace13 2 месяца назад

    8:05 Wrong kind of cat video, guess again.

  • Mathy Don
    Mathy Don 2 месяца назад

    Aw those poor rats, what a way to die. Sleep deprived to death...

  • Wolfpack Q
    Wolfpack Q 2 месяца назад

    I could use some sleep

  • pete1
    pete1 2 месяца назад

    If you take one thing from that video it should be: don't get reincarnated as a rat!

  • Ni Enye
    Ni Enye 2 месяца назад

    eeg isn't a new technique at all. wait.... how did I get here. I need to sleep.

  • Dreterria Maiden
    Dreterria Maiden 2 месяца назад

    So....we're Rats now ?😂

  • Clarinet Catato
    Clarinet Catato 2 месяца назад

    Here's what I think are the two most important facts about sleep: The fact that sleep is necessary and how much you should get

  • BvsMAcosh
    BvsMAcosh 2 месяца назад

    none of this is groundbreaking. Or even new.

  • actsrv9
    actsrv9 2 месяца назад

    poor lab rats

  • Vio
    Vio 2 месяца назад

    i have such a shit sleep schedule/cycle i know my brain & body are getting rekt.

  • Lester Stumpf
    Lester Stumpf 2 месяца назад

    am i the only one who is glad to not be a rat?

  • Graxster
    Graxster 3 месяца назад

    I guess it's a good thing that I go to sleep every night. Oh wait... I wasn't even worried about it. :D

  • apcolleen
    apcolleen 3 месяца назад

    what did people blame insomnia on before electricity?

    • brazwen
      brazwen 3 месяца назад


  • Praise Pepe, God of Kek
    Praise Pepe, God of Kek 3 месяца назад

    Well, that are happy rats

  • edward Andrews
    edward Andrews 3 месяца назад

    i only sleep for a hour and a half, been this way all my life, ive never had any side affects, i always feel rested and alert, and i even dream, drove my parents nuts when i was a child

  • bnighter
    bnighter 3 месяца назад

    so my kindle is killing me. softly.

  • icedragonxl4
    icedragonxl4 3 месяца назад

    There were some incorrect facts in this video that I hope it's okay for me to correct. In the first discovery that says that sleep can kill you is incorrect. The truth is we don't quite actually know if that's the case yet or at all. Yes mice die after a couple of weeks with no sleep but the symptoms that cause them to die don't seem to show in humans I believe; and yes, fatal familial insomnia is deadly and kills those afflicted with it, but again, we don't know if it's the lack of sleep that causes the death or the other symptoms of the disorder. Also, the date in #3 was incorrect as well. The activity of the brain during sleep wasn't discovered until the 1950s at the University of Chicago using electroencephalogram.

  • Ron Josh Ytem
    Ron Josh Ytem 3 месяца назад

    I wonder if the memory test was affected by the intermittent information gathered while the subjects stayed awake.

  • Eileen Albers
    Eileen Albers 3 месяца назад

    Fuck those people who kept the rats from sleeping

  • Algore Daemon
    Algore Daemon 3 месяца назад

    Indeed the correlation between sleep and memory is a very interesting one, particularly how deep-sleep is more related to memory consolidation (or perhaps 'dumping' instead). Now the thing I'm really curious about is the potential relationship between sleep and creativity, possibly also having to do with REM and the rich-associative and cognitive process of dreaming, which hasn't been given much thought in sleep studies at all until now. And this might have more to do with specific hormones but, you can ask any professional artist about their sleeping habits and overall productivity; you can't think and be genuinely creative unless you've had a good night sleep.

  • lovexsqualor
    lovexsqualor 3 месяца назад

    Wow lots of rat torture going on.

  • Amir Khan
    Amir Khan 3 месяца назад

    here we are still trying to understand why we sleep in this "advanced age" . and we still able to confidently shun the existence of God . have you any proof ??!

  • William Dwyer
    William Dwyer 3 месяца назад

    Prior to taming the dog (wolf), people probably had to sleep with "one eye open." Predators larger than us were in great abundance back then. So it wouldn't have been until dogs became common, that people could finally get a good night's sleep.

  • Jinx4one
    Jinx4one 3 месяца назад

    If less sleep is bad, what is the effect of too much sleep?

  • bluebooksky1
    bluebooksky1 3 месяца назад

    oh my God poor rats. 😞

  • ilikeceral3
    ilikeceral3 3 месяца назад

    Discovery by me: wow! Getting a full night's rest really DOES help! Too bad I never do it.

  • Trevor Carr
    Trevor Carr 3 месяца назад

    Scientist's gotta laugh sometimes, we sleep because WE ARE TIRED simple really.