The Unique Reason Reindeer Change Their Eye Color

Рет қаралды 165,945

Күн бұрын

Plenty of animal eyes "glow" in the dark, but only one species has eyes that change color with the seasons.
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Пікірлер: 187

@sebastianelytron8450 6 жыл бұрын

Probably the last SciShow upload under 5 million subscribers. An incredible achievement, a long time coming, and thoroughly deserved! Thank you team SciShow for making me smarter and wiser than I ever thought I could be. Over the years you've taught me more than I ever knew I needed to know. Congratulations on 5 million subs, an amazing channel!

@tommeng6522 6 жыл бұрын

Didn't you say that last time... XD Just saying

@Ian-bf4yk 6 жыл бұрын

Didn't you say that last time.

@Lady8D 6 жыл бұрын

regardless of whether or not you said it before, they've gone over 5m by well over 1,000 now so, yep.

@heidielliott4396 6 жыл бұрын

5,002,187 as of May 23 at 3:32 Los Angeles time

@Lady8D 6 жыл бұрын

Heidi Elliott 5,002,892 just 16min later...whoa! In my very uninformed opinion that counter seems to be going up quite fast, yes? Or is that pretty typical?

@nairobie755 6 жыл бұрын

Here where we have reindeer they are more known for standing on the road and refusing to move rather than anything to do with Santa.

@fredred8371 6 жыл бұрын

Winter is coming, their eyes turn blue... I think the night king turned them into wights

@dav1dsm1th 6 жыл бұрын

Winter is more likely to be fairly monochromatic (snow and everything else...) so higher contrast - which may make the fuzziness less of a problem.

@communisthank7267 6 жыл бұрын

soviet reindeers' eyes are always red

@user-bl9hh1xm9w 3 жыл бұрын

And drink only vodka! 😉

@changeeyecolor3891 3 жыл бұрын

👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

@helvetewinter68666 3 жыл бұрын

And starve

@Coastfog 6 жыл бұрын

"Voldemort spaced out once" @ 2:00

@JustinY. 6 жыл бұрын

So does this mean that Rudolf's nose was actually his third eye?

@tommeng6522 6 жыл бұрын

He must have gotten his third eye by meditating in the dark, dank, nights of winter.

@joshuaosei5628 6 жыл бұрын

:00

@TheFlipside 6 жыл бұрын

Please stop following me

@aliens3219 6 жыл бұрын

Justin Y. *He woke*

@supereggtartersauce6464 6 жыл бұрын

Hello again

@tommeng6522 6 жыл бұрын

Rudolf the red-eyed reindeer!

@changeeyecolor3891 3 жыл бұрын

👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍👍

@hustlehank6855 6 жыл бұрын

My burglar's eyes give me night vision

@willowoahh 6 жыл бұрын

Hustle Hank how have you not been arrested yet😂😂

@leaheart4411 6 жыл бұрын

Awesome video❤️ Super informative but broken down in a way I can understand!😊

@crystalkittykat3581 6 жыл бұрын

I love that name... Tapetum Lucidum

@marujitadiaz9019 6 жыл бұрын

She didn't pronounce it properly, the stress of "tapetum" is in the second syllable: /təˈpiːtəm/

@crazycatlady39 5 жыл бұрын

Humans have a little bit of one-that's why you get red-eye in the camera flash in photos.

@karriesoo 6 жыл бұрын

5 Million subscribers, congratulations!

@Psyadin2 6 жыл бұрын

Fun fact: Each Norwegian find on average 1 video per year (outside of Scandinavia) that mentions Norway. Just to ruin your video a bit, the eyes you see during the night wont ever change even if their eyes do, because there are no nights during summer that far north.

@unnatacharya 6 жыл бұрын

5 million for now pretty soon you guys would have 1 billion subscribers cause you guys deserve this.

@sayyid5869 6 жыл бұрын

Used to watch you guys when I was 12-13 when you used to get only 10-20 thousand views. Congrats on coming this far.

@QianBing 6 жыл бұрын

Congrats on 5 mil

@dausefulmarker 6 жыл бұрын

"A reindeer's eyes go through a range of hues, their gold but in the winter change to blue."

@SmartinatorPlus 6 жыл бұрын

Dausefulmarker yt ain't it so cool , reindeer contacts

@nameless7838 6 жыл бұрын

1:33 So Dang Dark i understood that reference!

@Jessejames7321 5 жыл бұрын

Nameless awesome reference

@themaskedcrusader 6 жыл бұрын

"So Dang Dark" reference to Rhett and Link, maybe??

@JasonBrower 6 жыл бұрын

Hehe so DANG DARK a little reference to Good Mythical Morning?

@nameless7838 6 жыл бұрын

Jason Brower i caught that too!!! lol

@joshdigi4 6 жыл бұрын

Hey, Tony Tony Chopper what is your eyes look like in winter at night? Chopper: I see little fuzzy.

@unvergebeneid 6 жыл бұрын

0:52 "Giving Retina a second chance at absorbing light." Well, Retina will be very happy to hear that. Everybody deserves a second chance, even Retina.

@xWood4000 6 жыл бұрын

So wait the reindeers ae specifically in the north of Norway? You would think that it would be in more countries. Edit: It is true, the subspecies is basically only located in Norway.

@magnusdagbro8226 6 жыл бұрын

They're also in Sweden, Finland and probably Russia.

@camellias.7106 6 жыл бұрын

Fordi vi er fantastisk!

@xWood4000 6 жыл бұрын

Camellia S. Inte lika fantastiskt som Finland.

@xWood4000 6 жыл бұрын

Magnus Dagbro So it is not a special breed of reindeer, it's all of them?

@MichaelDerryGameitect 6 жыл бұрын

"Eurasian Mountain Reindeer (Rangifer tarandus tarandus)" was the species used. The study was done specifically at the University of Tromso, Norway (70 N latitude). I think it applies specifically to the North because that's where environmental conditions produce these results, where the "sun is permanently above the horizon here from mid-May to the end of July and remains below it from late November to late January." The further south you go, the less extreme these long days are, so the effect might be less pronounced. That's just where this study was conducted. Links to sources were in the description.

@tazbidhasan7651 6 жыл бұрын

Congratulated for 5m

@jadegecko 6 жыл бұрын

"I wish I could trade a little blurriness for night vision" You do. Each of our cone cells (color/day) vision is wired to one nerve, producing a crisp image. But our rod cells (night vision) are wired in bulk to a single nerve - something like ten cells per nerve, I think? - so that a little bit of stimulus over a bunch of cells is still enough to trip that nerve. The tradeoff is that you have to draw from a larger area of the retina, meaning the resulting image is fuzzy. en.wikipedia.org/wiki/Rod_cell#Sensitivity

@rkpetry 6 жыл бұрын

*_...I'd've supposed that changing focus puts more pressure on the eyeball-slightly..._*

@zoofan9280 6 жыл бұрын

So now I know how deer eyeballs work thanks scishow

@GiulerPowerGamer 6 жыл бұрын

Activating the Rennigan!

@lenaevess 6 жыл бұрын

Reindeer are also found in Finland, Sweden, Russia and Canada, not only in Norway

@SnahLhug 6 жыл бұрын

*The shadows from her eyeglasses are very distracting.* I know it's hard, but there's surely something the lighting guys can do about it.

@js-um2mg 6 жыл бұрын

I'm the 5,000,000th subscriber!!!!! Congratulations SciShow!

@rickaaayyyhoffman4893 6 жыл бұрын

1:34 Im not afraid of the dark, Im afraid of what's in the dark

@oppfattet 6 жыл бұрын

I've seen reindeers my entire life, and I did not know that their eyes changed colour like that! Always thought they were blue.. Though I've never seen one in the dark during summer because of the pesky midnight sun.

@alnahian1796 6 жыл бұрын

please make a video on evolution tree of vertebrate mainly on chordate

@Chickensandjohnwich 6 жыл бұрын

It’s obvious from the thumbnail that these reindeer are thralls of the night’s king.

@invisghostie6204 6 жыл бұрын

I squeezed my eyeball and now I have night vision

@jimbradshaw5600 6 жыл бұрын

Request: Explain Apraxia of Speech. my son was diagnosed with this and an effort to explain why he is unable for form words. Sharp "ah" "Oh" and small basic words, like Mama or Dadda Chez-it and a few others are the only things he can form. Now he is a teenager. I have a hard time trying to explain this to others that interact with him on why he it the way he talks. Thanks

@bedepal 6 жыл бұрын

when its so dank dark, so dank dark so dank dark so dank dark

@allenemmanuelbinny6295 6 жыл бұрын

Dear Sir, Can you please explain why my specs(concave and cylindrical) casts shadow when placed in sunlight.

@RunItsTheCat 6 жыл бұрын

Turns out the wall the Night King broke down in GoT was the 4th Wall. Now their reindeer vanguard is here.

@elanianiyvwia8687 6 жыл бұрын

Well it really doesn’t matter if the mountain lion hunting you looks a little out of focus. As long as you see him!!! Sure you might not be able to make out detail. But why would you want to count his whiskers when he’s going to eat you!!! Knowing he’s there is what’s important. Not if he’s blinking or not!!

@magnusdagbro8226 6 жыл бұрын

Wolves. There are no mountain lions where these Eurasian reindeer live.

@thecatxx 6 жыл бұрын

One time i took a picture of my cat with the flash on and she had one green eye shine and one yellow one

@AnimilesYT 6 жыл бұрын

Phone with flashlight == nightvision (well, close enough)

@kcazseeley 6 жыл бұрын

Can you do a video on colorblindness and better night vision?

@dchandula9060 6 жыл бұрын

I wonder how Hank would present this! Miss the guy.

@barneymiller7894 6 жыл бұрын

Can we just get to the point in technological advancement where we have electronic eyes so i can also have adjustable night vision? lol

@roseisabelle1061 6 жыл бұрын

Might I just ask (and hopefully will be answered) *Is it normal to get anxious or why do I get nervous when I start playing this particular game?* (refering to mobile legends) I don’t know why but everytime I start up a match, my stomach feels twisted or my hands start to sweat a whole lot. I live in a tropical country and it’s pretty hot but when I play, my hands get very cold so i tend to turn off the fan but then they sweat a lot once I do. Sometimes I play in an airconditioned room thinking my hands won’t get sweaty but then my whole body starts shaking but it wasn’t even that cold. Great, do I have a game anxiety now or what ;-;

@lucaspilgrim8064 6 жыл бұрын

does this affect caribou too?

@xadahgla Жыл бұрын

Piano!

@beenjammin1750 6 жыл бұрын

The very first line of the video contains a rhyme which sounds like the beginning to a poem.

@saber1992 6 жыл бұрын

so what is the chance to be born with tapetum lucidum, as a person? Because if you shine a light to the side of my eye it comes out the front. i have pretty good night vision, im not a cat, but contrasts come quicker than regular in the dark.

@KitZunekaze 6 жыл бұрын

WOULD YOU RATHER? Have blurry vision all the time, but have complete night vision OR Not have night vision, but have 20/20 vision instead.

@stevenserrano947 6 жыл бұрын

Her hair is nice

@j5892000 6 жыл бұрын

She would have even worse eye sight and night vision.. which would still make have her vision be worse then it is now.

@dynamicjaethought7788 6 жыл бұрын

That and their glowing noses.

@skipjack91 6 жыл бұрын

1:33 GMM reference!

@lixxxxit 6 жыл бұрын

...so what you're saying is that "eyes aren't really glowing".....is that why i can't see them unless I'm shinning a light towards them? Wow, trippy.....

@justiny.2653 6 жыл бұрын

Hold on guys, I'm evolving.

@SmartinatorPlus 6 жыл бұрын

I understood that reindeer can have natural colour changing contact lens

@Kwodlibet 6 жыл бұрын

Eyeballs are me of Eyeballium - an element to the right of Unobtainium - Nobel Prize please?

@sclmitter4482 6 жыл бұрын

Cool

@BobSmith-tm2kj 6 жыл бұрын

is anyone else hearing the audio get louder then softer?

@---uf1ex 6 жыл бұрын

So if I stay in a dark room for months I might change my eyes color? Lol Gonna try it off and tell the results below.

@elliebennett3005 6 жыл бұрын

But why do my eyes go light blue when im on a biploic maina and dark grey when I'm on a down??????? Its not just me who's noticed and I've photographed it

@rfldss89 6 жыл бұрын

do you mind sharing the pictures?

@elliebennett3005 6 жыл бұрын

Rafael Dos Santos they're all portrait photos of my face so not massively happy to sorry,

@Rickuo 6 жыл бұрын

You could just snip out your eyes with the program Paint.

@elliebennett3005 6 жыл бұрын

Rick West out of context that'd be a terrifying message

@Rickuo 6 жыл бұрын

Yeah, that's because I specifically wrote "program".

@iTracti0n 6 жыл бұрын

It's their kekkei genkai. Don't fall for their genjutsu.

@OutlawMaxV 6 жыл бұрын

That or they get high on The Spice for them blue eyes

@elanianiyvwia8687 6 жыл бұрын

Flying Spaghetti Monster dune!!!!

@OutlawMaxV 6 жыл бұрын

Ayyy

@animistchannel2983 6 жыл бұрын

FSP: Well, if anyone knows how to navigate the primal chaos of eternal adaptation, it would be you... Oh, and, Alfredo sauce rules! (A little heretical, I know, but adding more cheese is generally the better idea.)

@Zahri8Alang 6 жыл бұрын

Hmm, I thought only creatures with stereoscopic vision has tapetum lucidum, guess I was wrong.

@a.r.h9919 6 ай бұрын

Wonder if any ancient human or hominid group maybe even giants like asoiaf could have evolved such ability if were they nomadic in nature from forests to the tundra wasteland

@ScienceByMike 6 жыл бұрын

Someone install reindeer eyes in me

@vijaya139 3 жыл бұрын

cool

@grendelum 6 жыл бұрын

So don’t bother showing us any photos of reindeer eyes at night in summer or winter... those dissected eyes are enough 🙄

@justacat2318 5 жыл бұрын

The thumbnail shows a Sans-deer.

@IamrealX 6 жыл бұрын

can we make glasses that simulate this effect to help us see better at night?

@chocolatebunnies6376 4 жыл бұрын

IamrealX Yes, but you have to wear them behind your eyeballs.

@faisalshathri6376 6 жыл бұрын

wired Q did frats evolve?

@YouPlague 6 жыл бұрын

Trading clarity of vision for night-vision capability as a human is a pretty stupid idea.

@neomamuro 6 жыл бұрын

Now I understand why they bullied Rudolph. First, a girl having guy's name is already fodder for childish jests. Then I can imagine the more educated reindeer going "Why do you have a glow in the dark nose? WE CAN SEE IN THE DARK! Charles Deerwin would sure scoff at this evolutionary trait!"

@derain95 6 жыл бұрын

So when do we start using Crispr to give humans night vision?

@01Phenom 6 жыл бұрын

I don't need tapetum lucidum to see that Olivia is a bae

@fandujar83 6 жыл бұрын

And dogs

@Pile_of_carbon 6 жыл бұрын

Soo... raindeers turn into white walkers in the winter?

@kj7707 3 жыл бұрын

She looks like Amy Farrah fowler from the big bang theory

@veronicagorosito187 6 жыл бұрын

Please do something with the new trend ''biokinesis''. They really feel their eye color changed. Maybe posting a scientific opinion on why audio ''suggestion'' doesn't work to change eye or skin color? the topic covers a lot of auto-sugestion videos. And yes most of them believe the Earth, is flat -.-

@adamgrouta6886 6 жыл бұрын

Why do goats faint?

@zombieblood1675 6 жыл бұрын

Reindeer are a myth made by the government to hide me and my fellow zombie's existance

@007batman8 6 жыл бұрын

zombie blood ik it a joke but reindeer are domesticated Caribou

@zombieblood1675 6 жыл бұрын

007 BaTMaN ty for the info dad

@BunnyKitKat 6 жыл бұрын

Why don't all animals have depth perception?

@marinachase8484 6 жыл бұрын

Snow White be trippin with the glowing eyes in the forest ... She should see this.

@horsesandsmilesable 6 жыл бұрын

It’s called tapEEdum lucidum. I’m a veterinarian. I would know.

@guifrakss 6 жыл бұрын

Good for you.

@sUjU91 6 жыл бұрын

Whatever we all know they are white walkers

@asaguda 6 жыл бұрын

Why the title change from the topic in short to a more clickbaity one?

@tunnelnugget3181 6 жыл бұрын

So the question is, can I add a coating to my contact lenses to reflect light back into my eyes to create night vision? I want this to be a thing. lol.

@woodfur00 6 жыл бұрын

Well, no. Unless you wear your contact lenses behind your eyeballs.

@tunnelnugget3181 6 жыл бұрын

woodfur00 I don't think it would have to be behind the eye. At least some of the light would reflect off the retna and the back of the eye. It probably wouldn't be as efficient though. It would just have to be a one way mirror kind of deal.

@woodfur00 6 жыл бұрын

Are you saying light enters the eye, bounces off the retina, and then bounces back off the contact lens?

@tunnelnugget3181 6 жыл бұрын

woodfur00 Exactly. I didn't explain it well.

@woodfur00 6 жыл бұрын

Well, bad news: One-way mirrors aren't really one-way. They actually have the same reflectivity on both sides, and the side that can be seen from either direction is whichever side has the most light coming from it.