9 Groundbreaking Discoveries About Sleep

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.

Hosted by: Hank Green
Support SciShow by becoming a patron on Patreon: https://www.patreon.com/scishow
Dooblydoo thanks go to the following Patreon supporters—we couldn't make SciShow without them! Shout out to Kevin Bealer, Mark Terrio-Cameron, KatieMarie Magnone, Patrick Merrithew, Charles Southerland, Fatima Iqbal, Benny, Kyle Anderson, Tim Curwick, Scott Satovsky Jr, Will and Sonja Marple, Philippe von Bergen, Bella Nash, Bryce Daifuku, Chris Peters, Patrick D. Ashmore, Charles George, Bader AlGhamdi
Looking for SciShow elsewhere on the internet?
Facebook: http://www.facebook.com/scishow
Twitter: http://www.twitter.com/scishow
Tumblr: http://scishow.tumblr.com
Instagram: http://instagram.com/thescishow

Brain activity

Brain centers




Blue light



Просмотров: 482742
Длительность: 10:35
Комментарии: 1361

Тэги для этого Видео:

Найти больше видео в категории: "27"
Видео загрузил:
Показать больше видео, загруженных


Автор Eileen Albers ( назад)
Fuck those people who kept the rats from sleeping

Автор Algore Daemon ( 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.

Автор lovexsqualor ( назад)
Wow lots of rat torture going on.

Автор Amir Khan ( 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 ??!

Автор William Dwyer ( 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.

Автор Jinx4one ( назад)
If less sleep is bad, what is the effect of too much sleep?

Автор bluebooksky1 ( назад)
oh my God poor rats. 😞

Автор ilikeceral3 ( назад)
Discovery by me: wow! Getting a full night's rest really DOES help! Too bad I never do it.

Автор Trevor Carr ( назад)
Scientist's gotta laugh sometimes, we sleep because WE ARE TIRED simple really.

Автор Martin Collins ( назад)
That I'm not getting enough

Автор daisy3690 ( назад)

Автор SajoieDeVie ( назад)
I have childhood onset idiopathic insomnia, so I can tell you that not sleeping sucks incredibly. Also, I watch a lot of insomnia related videos just in case one day doctors figure out my specific type of insomnia.

Автор Vijay Agrawal ( назад)
how did they make the rats not go to sleep?

Автор Piggy ( назад)
so ironic of me to watch this at 3 am

Автор vogonsrock ( назад)
Great video (although in this case didn't tell me anything new) but what I mostly went away with from this was 'gee rodents have *really* suffered in our attempts to figure out sleep'.

Best App for PC in my opinion for blue-light-reduction is; FLUX(f.lux)
The best for MOBILE are; EasyEyes(easiest), Twilight or flux mobile. I would use easy eyes as Twilight gets a little invasive.

Автор ummm... ( назад)
3rd of our lives spent sleeping? I average about 5 hours a night and sleep like poo. Guess I'm screwed

Автор Abdelgafar El Masry ( назад)
Hank, you're a legend, keep making those videos because you & Micheal are great presenters.

Автор 340PD ( назад)
The amount of calories that Hank Green burns during one of his videos would amaze you.

Автор Dari Bluestar ( назад)
Stop comparing rats to humans 1st of all & "a group of researchers" nah fuck dat... conduct your own research.

Автор Nathaniel Brigham ( назад)
I'm not against testing on rats, but still... Poor rats.

Автор Georgia Lloyd ( назад)
Omg I'm going to die really soon then

Автор Srijan Raghunath ( назад)
ironic because we are watching this on a phone, computer, etc.

Автор HAB ( назад)
Paleo-Sleeping = Awesome!

Автор HeyHay ( назад)
currently trying to heal a huge surgical wound going from the bottom of my rib cage to my pelvis. Lots of pain control and healing required. No wonder I sleep so much.

Автор Pur ( назад)
Hmmm wonder why as a teenager we remember things better (I slept 12 hrs a day then) vs as an adult (6 maybe 7)....does this also affect learning new things...."old dogs can't learn new tricks". Just saying...

Автор Emmie Knobloch ( назад)
Fatal Familial Insomnia doesn't actually kill you through lack of sleep - it's caused by misfolded prion proteins, like mad cow disease or Creutzfeld Jakob disease. Insomnia is a symptom of the degradation of the brain tissue in the thalamus, as the prion proteins form aggregates that inhibit brain function. You can die from lack of sleep, but this disease kills you by brain degradation.

Автор bret you ( назад)
they burn rats and deprive them of sleep to study the correlation, nice , who exactly are the vermin again? i hope I'm misunderstanding something here

Автор Jason Miller ( назад)
The shadow from his collar makes it look like he's got some serious chest hair

Автор Gauge Wiley ( назад)
All of this research has led me to one conclusive decision: Scientists are dicks to rats.

Автор christoc99 ( назад)
I had a nice dream last night🇦🇷

Автор Justin Phillips ( назад)
not only did they sleep deprive the rats until they died but they also burned them and then sleep deprived them?

Автор Eddie ( назад)
Ironic how im staying up, by choosing to watch the video instead of going to sleep...

Автор Pingu 42 ( назад)
I should be sleeping right now...

Автор WRINN GENOCIDE ( назад)
do viruses and bacteria sleep?

Автор David C ( назад)
"Scientists don't understand WHY we need sleep..."

*then explains how sleep deprivation destroys internal organs and kills us*

Автор Bearcat Ben ( назад)
Who else is watching this while supposedly trying to sleep

Автор Blanche Konieczka ( назад)
wish someone could explain to me why I often go into REM sleep within minutes of falling to sleep. my dreams are frequently vivid, colorful and complex. my oldest son also enters REM sleep within minutes of falling to sleep. Have researched this and most of the info indicates "normal" people enter REM sleep at least an hour after going to sleep. quickly entering REM has been linked to narcolepsy but neither my oldest nor I suffer from this condition. has any research been done in this area?

Автор Tess Wheeler ( назад)
I can't believe that rats were killed for this. I have two pet rats and I love them soooooo much and this nearly made me cry

Автор Michael Gugala ( назад)
you talk talk to fast

Автор theRPGmaster ( назад)
I'm watching this instead of sleeping

Автор lior kosoy ( назад)
if you sleep more youre going to live more
but if you sleep more you experience less life

Автор pissicutza09 ( назад)
Rat killers.

Автор J1.92c ( назад)
Sleep is the only door in to the 4th dimension... 😛

Автор duckmanjoel ( назад)
The question should not be why do we sleep, but why do we wake up. The earliest cells would be mostly 'sleeping' unless they got hungry. But like the evolution of hearing and sight, organisms 'woke up a little' to find food. The cells that evolved to stay active longer were able to survive. Multi-cell organisms continued the trend until we observe what we observe today. The best example I can give is eggs. The first eggs were in the water. Then animals returned to the water to lay eggs. Then animals laid eggs with a shell. Then animals held the eggs in their body. Mammals have a live birth but the amino fluid is like the early ocean. Sleeping is the neutral or natural state of life where it lives best. Sleep is evidence of evolution like the mitochondria DNA in our cells. Consciousness is the altered state of being. Sleep on it.

Автор Magnificent Maggie ( назад)

Автор Helo Blue ( назад)
Wish it was like Dr. Strange where your physical body can sleep but your mental self and still study. OHHHHHHHHH if only it were real.

Автор Kelsqi ( назад)
Takes longer for burn wounds to heal? What the f.. That's terrible, we were burning them and watching how long it took to heal? F.

Автор blackplight4u ( назад)
Medical advances must be attributed to the mighty RAT! Let's thank Mr. RAT for his honorable sacrifices!

Автор R. Ke ( назад)
Watching this made me sleepy. 😪

Автор CLINTON JONES ( назад)
...how about a 'dreamworld' dissertation. Not the 'imagination' version, but the 'reality' comparison (cognition) ...what if a researcher progressively 'sequenced' a similar (to the waking) world and found 'alignment' to be the 'trick' and once accomplished, anyone could 'assemble' many 'temporal worlds' while asleep ...maybe finding that 'this world' is but one choice of many and that 'immortality' could be the real truth of existence (in time)

Автор Darthimus Prime iii ( назад)
Is it ironic that I'm watching this at 2am cos I can't sleep? All this talk about sleep is really making me tired though *yawns*

Автор Shibashish Mahapatra ( назад)
This video truly appreciates the contribution of lab rats.

Автор thuy nguyen ( назад)
“Don’t get addicted to this game just because you see my name” - Abraham Lincoln
iOS: --------- https://itunes.apple.com/us/app/swing-rush/id1030283080??ls=1&mt=8
Android: ---- https://play.google.com/store/apps/details?id=fourtee.wheeldashdash

Автор Britta Lauritzen ( назад)
I would be interested to hear if the study with the hunter gatherer tribes took into account daytime naps. if you're getting 6-7 hours a night, but then a couple of hours sleep after lunch, then you'd probably be topping a lot of Western workers sleep times.

Автор Tim Johnson ( назад)
Watching this video while affected by insomnia 😕

Автор Becka Imnottelling ( назад)
So is the sleep deprivation and pain corellation the reason stepping on a Lego in the middle of the night hurts like a mothereffer?

Автор hoosierhiver ( назад)
On a side note, when I give up smoking pot for a week or two, I have loads of crazy dreams every night. It's practically exhausting.

Автор Christine Nguyen ( назад)
I get a few hours of sleep a night (2-4) then pass out for 15 hours straight after a week

Автор 84singularity ( назад)
blue light is dangerous..
..and you put blue background on the video?!

Автор Jerry VanNuys ( назад)
Finally! A SciShow about my favorite pastime.

Автор Angel ( назад)
Not dying seems to be a pretty acceptable reason "why we do it"

Автор Maddie Briggs ( назад)
I read it as sheep and now I want a video on ten groundbreaking discoveries about sheep.

Автор Munchie Munch ( назад)
How did they keep the rats awake?

Автор Barley Bulnes Jr ( назад)
Why we can't remember our dreams after waking up ?

Автор vgman94 ( назад)
Poor fucking rats. Is there anything scientists WILL NOT do to them?! :(

Автор Corey Kamkoff ( назад)
#8 is us humans defragging our brains?

Автор DrSpooglemon ( назад)
I always hate to hear about those rodents that are tortured to death in the name of science.

Автор Nara Feralina ( назад)
Dishwasher mode activate.

Автор Vsevolod Yatsevich ( назад)
You need to breathe, so don't cut it out. I can't follow all the info without the gap between the sentences.

Автор PirateDion ( назад)
There are times when I would love to be a scientist discovering new things....

But then hearing about a study to keep rats from sleeping just sounds so horrendous to me. Great that we know answers to questions but I think it would bother me too much to be such a dick lol.

Автор Xx Blaineworld xX ( назад)
iOS has a built in Night Shift Mode-screen displays red instead of blue.

Автор Setto Arisaki ( назад)
I had sleep paralysis back then and couldn't fall asleep when it was dark. So i went to sleep at 17 or 18 PM most of the time, and woke up at 1 or 2 AM. And then lied in my bed until 6 AM when my father would wake up. That's what i did for over 4 years, after i for some reason stopped automatically lucid dreaming and even forgot how to over the time, and in the 9th grade, around 5 years later i found out what was going on with me.
Sadly my parents never knew what was going on with me and never believed me. They thought i was too scared of movies and games and forbid me to play computer games until i was in 8th or 9th grade.

Even if i only had a nightmare once or twice a month. What is probably pretty normal if you are a kid.

Now i can lucid dream again and have 0 nightmares and no sleep paralysis. I actually prefer nightmares because they are really interesting and you learn much about yourself. Its like you see who you really are without lying to yourself. Helped me really much to get a stronger personality.

Автор Hotshotgaming15 ( назад)
ur talking about sleep and no sleep wht about lack of sleep ex 2-5 hours

Автор xHaniffax ( назад)
how does a device emit blue light? does this apply even when the phone is off? Is it the effect of using your phone right before sleep that disturbs melatonin?

Автор aloofone ( назад)
you always deliver awesome shows. thank you.

Автор Aldo Novak ( назад)

Автор the void ( назад)
I'm tired

Автор ixiahj ( назад)
This video made me feel sorry for lab rats.

Автор Penguins ( назад)
Everytime I try to sleep I get raided

Автор Phoenix ( назад)
what if the dreams that happen during R.E.M. sleep is just the brain dumping it's cache from making declarative memories

Автор Maeva Dhorme ( назад)
Like what when some think that sleeping is useless, and wastes time on all things to see in life ...

Sleep thus remains important for the body to recover from the pains and most of the pathologies.

And on the contrary, lack of sleep has an adverse effect on health, such as having allucinations, or even being able to die of it.

This is at stake on the endocrine system and can create pathologies that would be transmitted genetically.

Indeed, sleep is part of a healthy lifestyle, and allows among other things to remain alert to the dangers.

Of course, we will not be able to see everything in our lives, and it is better to lose 6 to 8 hours of our time to sleep, to better understand the things of life, than to miss dying.

Thank you for this very interesting video, which should be shared as much as possible, because it would also allow the whole world to avoid situations of war, stress, aggressiveness and anger between people. And after a good sleep, one is usually, more attack to assume a day in a fluid way.

Автор davi santos ( назад)
....do you ever think we should maybe stop doing all this shit too rats

Автор davi santos ( назад)
I went on an adderall binge Monday night too study, after not being able too sleep for 3 nights straight I developed amphetamine psychosis and freaked fucking out in school today.... thought I'd share that

Автор Cuzeg Spiked ( назад)
Who watched just as they were about to go sleep? I did.

Автор obscurelobster ( назад)
So I have only slept 4 hours every night for a year and you have me convinced I am going to die.

Автор Adam Sea ( назад)
People sleep because they need to rest. This is something we all need to do a lot more of.

Автор Jay Amour ( назад)
Very interesting, but where is the love for the rats? Those poor little bastards have a rough life.

Автор insertnamehere001 ( назад)
They sell blue-light cutting glasses, even in places like two dollar shops, in Japan. I'm quite baffled as to why they aren't sold in the West, I had to order mine in from Japan.

Автор Stupid Person ( назад)
poor rats

Автор John Winters ( назад)
Horse shit. Nah not watching the video. Me and any number of the percent of the population who have stayed up for more than 100 hours in a row can tell you sleep is not fatal. Sleep is not fatal. Sleep is not fatal. The things you DO when you lack sleep ARE fatal. Like driving, operating machinery, and cooking with oil.

Автор Adam Kendall ( назад)
We sleep because of the rotation of the Erf. It's not that difficult of a concept. Kinda like why menstral cycles are 28 days.

Автор Filippa MD ( назад)
4:21 can i just say he looks like he needs to get some sleep

Автор Ellis M ( назад)
if you are sleep deprived and close to death and you sleep, how long will you sleep for and how long will it take to recover?

Автор Haxel Stranger ( назад)
lemme dab that family out they will knock out for sure

Автор Galina Tsoneva ( назад)
Can you please explain the yo-yo effect in dieting? And nasal allergies when you can't stop sneezing and your face gets swollen? Why go to pee every few minutes like it's been ages, when you are cold?

Автор Jack 'o Bong ( назад)
my name is Giacomo. fuck.

Автор Joshua Real ( назад)
I should be sleeping right now

If I took naps in the middle of the day then I couldn't sleep at night

Вставка видео:


Поиск Видео

Top Видео


Seo анализ сайта