9 Groundbreaking Discoveries About Sleep

  • Опубликовано:  8 месяцев 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


  • ОбразованиеОбразование
  • Длительность: 10:35
  • 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: 1 544

  • pranay forever
    pranay forever День назад

    Blah blah blah... too much talking

  • MarschStudios
    MarschStudios День назад

    Thanks for making these phenomenal videos. I've read an article or two suggesting that in past eras (Medieval, etc) humans had "two sleeps:" they went to sleep with the sun, woke in the middle of the night and went about their business, and then slept again until sunrise. Could you research this and make a video?

  • Keilani Kekoa
    Keilani Kekoa 5 дней назад

    Watching this in bed before sleep

  • Kat!668 Japan!668
    Kat!668 Japan!668 5 дней назад

    I have severe insomnia. When im not in a sport i get about two to four hours of sleep per day and once a week i would get no sleep. When i am in a sport i oversleep. I get ten to twelve hours of sleep per night. . .

  • Intex Cloud S9
    Intex Cloud S9 5 дней назад

    exit light enter night...off to never never land

  • Sixtine Lejay
    Sixtine Lejay 6 дней назад

    Poor rats.

  • Derek Knight
    Derek Knight 9 дней назад

    What a trip! CSF cleaning the brain in dishwasher mode. Thanks for the video!

  • TCGBattling Master
    TCGBattling Master 10 дней назад

    i listen to these to fall asleep

  • Rafael Eleutério
    Rafael Eleutério 12 дней назад

    ok, sleep deprivation can kill you, but... what about excess sleeping? What happens to your body when you force it to sleep more than it needs?

  • J.A. Wolf
    J.A. Wolf 12 дней назад

    WTF. Did the rats volunteer to be painfully shocked and burned in the name of human-centric science?

  • DaveTheWave
    DaveTheWave 16 дней назад +1

    Watching videos helps me fall asleep it doesn’t prevent me from falling asleep

  • Sam Stevenson
    Sam Stevenson 17 дней назад

    Not sleeping to watch this video

  • JustyFied
    JustyFied 19 дней назад

    Just me or does the doctor at 4:20 look high?

  • adecree
    adecree 20 дней назад

    Did they really have to burn the rats?..

  • d bush
    d bush 22 дня назад

    There was no mention of what happens when you sleep too much. Maybe another video for that topic?

  • Jolie Giacomo
    Jolie Giacomo 23 дня назад

    Can you cry in your sleep? I've recently gone through heartbreak. Daytime I listen to nothing funny things & stay busy. However when I woke up my face was swollen as if I had been bawling all night. No food allergies.

  • L1QU1D AC1D
    L1QU1D AC1D 24 дня назад

    HEY! I know why we go to sleeps!

    We get tired

  • MyBubbleInSpace
    MyBubbleInSpace 25 дней назад

    Could you make a video on narcolepsy? And hopefully on the potential studies for a cure? I've had it since I had the vaccination against swine flu in 2009 and would really appreciate it. Love your channels!

  • llarry2769
    llarry2769 27 дней назад

    thinking of how many rats had to die is going to keep me awake at nights

  • William Calhoun
    William Calhoun 27 дней назад

    Quit the unnecessary sadistic animal experiments. Did we really need to know that so badly that we had to torture something to find it out?

  • Lightningmonky 7
    Lightningmonky 7 Месяц назад

    We sleep because we're tired, DUH

  • another one
    another one Месяц назад

    "I never sleep cause sleep is the cousin of death"

  • Raul Salcedo
    Raul Salcedo Месяц назад

    The ground still remains

  • Michael Meissner
    Michael Meissner Месяц назад

    Number 7 is why I use Gunnars

  • cheeseman
    cheeseman Месяц назад

    This is one of the videos I was watching while procrastinating going to sleep.

  • FrostedMantis
    FrostedMantis Месяц назад

    Who's watching this vid in bed

    Also, who's tired?

  • Wendy Aston
    Wendy Aston Месяц назад

    I am going to sleep 😴 10:00 pm

    TWNST LBC2 Месяц назад

    6:45 how did the rats get burn wounds tf

  • allie paterson
    allie paterson Месяц назад

    I hardly sleep but when i do it is uncomfortable and i have nightmares sometimes to lol.

  • tobechukwu anyanwu
    tobechukwu anyanwu Месяц назад

    Couldn't help thinking about all those sleep deprived rats subjected to shock after shock ( ._.)

  • tobechukwu anyanwu
    tobechukwu anyanwu Месяц назад

    Watching this on a smartphone at 1:32 am ( ._.)

  • Thomas Cummings
    Thomas Cummings Месяц назад

    At 0.5 speed he sounds drunk

  • vadadiud ines
    vadadiud ines Месяц назад

    We sleep bc were tired

  • chrisgosselin92
    chrisgosselin92 Месяц назад

    Kinda just breezed over the sleep affecting burn healing, based on an experiment on rats. Damn that almost seems unethical.

  • Isaac Wedige
    Isaac Wedige 2 месяца назад

    He said sleep so many times it doesnt sound like a work anymore

  • Alvin Lofton
    Alvin Lofton 2 месяца назад

    They have them rats hell

  • João Vieira
    João Vieira 2 месяца назад

    Poor rats...

  • Arron Bell
    Arron Bell 2 месяца назад

    Poor rats, had a tough time in the 70s

  • Crystal Majestica
    Crystal Majestica 2 месяца назад

    The blue light thing...
    So if you look at images of Sonic the hedgehog or Mega Man on your phone, they would disrupt your sleep?

  • Courtney lovell
    Courtney lovell 2 месяца назад

    Can the show do a video on: "The importance/use/purpose of [the] tags on clothing"- Courtney L.

  • Jordan Levitt
    Jordan Levitt 2 месяца назад

    4:21 you know, for a doctor who has aided research on sleep, he really doesn't look like hes had much of it.

  • Original Precursor
    Original Precursor 2 месяца назад

    WTF are these horrifying people doing to these poor rats. I mean....good god.

  • Andre Le Roux
    Andre Le Roux 2 месяца назад

    Why do a lot of kids grind their teeth in their sleep?

  • novocras
    novocras 2 месяца назад

    How does sleep play into depression? I've read articles about how too much sleep can lead to an early death. But if depression is an illness how does that play out.

  • ??? %
    ??? % 2 месяца назад

    What about the guy who lost the ability to sleep,but was wayyy more efficient at doing things?

  • LegendaryHarpSeal52
    LegendaryHarpSeal52 2 месяца назад

    This is click bait, when I heard these discoveries, the ground beneath me didn't break, I'm so pissed 😡 this click bait is wrong. Stop the click bait.

  • Mikayla Eckel Cifrese
    Mikayla Eckel Cifrese 3 месяца назад

    Can medication help people with that type of insomnia?

  • Bob Bobson
    Bob Bobson 3 месяца назад

    It would be nice if the word "believe" could be replaced by "think". For instance "that discovery led scientists to think that sleep is..."

  • Rock Balancer
    Rock Balancer 3 месяца назад

    number 7 he says with that background.... with my screen on max... in the dark... i should go to sleep

  • Cindy Durán
    Cindy Durán 3 месяца назад +1

    Poor rats 🐭.

  • Melissa Corzo
    Melissa Corzo 3 месяца назад

    my favorite activity is sleeping

  • Yash Agarwal
    Yash Agarwal 3 месяца назад

    my braining is learning about it self.....thug life😎😎😎

  • D.E.B. B
    D.E.B. B 3 месяца назад

    Perhaps the biggest myth, is that you're unconscious when you're asleep. Not so; you're just in a different state of consciousness. You will respond to a crying baby, phone, an itch, pain, alarms, someone trying to break into your house, etc..

  • Mireille
    Mireille 3 месяца назад

    "Rats had a harder time healing burn wounds" I wonder how did they tested that poor fellas

  • shorea27
    shorea27 3 месяца назад

    Oh man, poor rats.

  • Salvator Merrifield
    Salvator Merrifield 3 месяца назад

    why is that spot below his throat censored?

  • T.W. Someone
    T.W. Someone 3 месяца назад

    talking without pauses is kinda difficult to listen to

  • kit ten
    kit ten 3 месяца назад

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

  • Issac Lumbard
    Issac Lumbard 4 месяца назад

    What about sleeping too much?

  • WWZenaDo
    WWZenaDo 4 месяца 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 4 месяца назад

    Oh, poor little rats...

  • cass c
    cass c 4 месяца назад

    why have scientists been burning rats?? 😔

  • Mario Capistran
    Mario Capistran 4 месяца назад

    nothing groundbeaking here

  • CindyMzLuciLulu
    CindyMzLuciLulu 4 месяца назад

    Is too much sleep bad for you?

  • Reymart Abude
    Reymart Abude 4 месяца назад

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

  • kittcat223
    kittcat223 4 месяца назад

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

  • kittcat223
    kittcat223 4 месяца назад

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

  • Ryan Lundgren
    Ryan Lundgren 4 месяца назад

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

  • Julia Gustepa
    Julia Gustepa 4 месяца 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 4 месяца назад

    What's in my tears

  • Victor Rodriguez
    Victor Rodriguez 4 месяца назад

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

  • Detailed Obscurity
    Detailed Obscurity 4 месяца назад

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

  • Kitty Cat Kiss
    Kitty Cat Kiss 4 месяца назад

    Currently watching this at 4am.. (:

  • Trigon Playz
    Trigon Playz 4 месяца назад

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

  • Theroy Series
    Theroy Series 4 месяца назад

    Was the host wearing a TRIFORCE t-shirt?

  • James August
    James August 5 месяцев 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 5 месяцев 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 5 месяцев 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 5 месяцев назад +1

    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 5 месяцев назад

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

  • Tagger Tag
    Tagger Tag 5 месяцев 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 5 месяцев назад

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

  • Hestia St. Olympia
    Hestia St. Olympia 5 месяцев 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 5 месяцев назад

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

  • 8000 cats
    8000 cats 5 месяцев 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 5 месяцев назад

    Rats everywhere

  • jeaniebird
    jeaniebird 5 месяцев 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 5 месяцев 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 5 месяцев назад


    if jmkjn

  • Beef Shishkabob
    Beef Shishkabob 5 месяцев 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 5 месяцев назад

    Why are we so mean to rats?

  • KarinARTS
    KarinARTS 5 месяцев назад

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

  • Turtletech Inc.
    Turtletech Inc. 5 месяцев назад

    The hippocampus, where all your memories about hippos are stored

  • Entity 303
    Entity 303 5 месяцев 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 5 месяцев 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 5 месяцев назад

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

  • Saleem Al-Agha
    Saleem Al-Agha 5 месяцев назад

    i think wifi interferes with sleep

  • offspring
    offspring 5 месяцев назад

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

  • Elizabeth Shaw
    Elizabeth Shaw 5 месяцев 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 5 месяцев назад

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