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The science of skin color - Angela Koine Flynn

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View full lesson: https://ed.ted.com/lessons/the-science-of-skin-color-angela-koine-flynn When ultraviolet sunlight hits our skin, it affects each of us differently. Depending on skin color, it’ll take only minutes of exposure to turn one person beetroot-pink, while another requires hours to experience the slightest change. What’s to account for that difference, and how did our skin come to take on so many different hues to begin with? Angela Koine Flynn describes the science of skin color. Lesson by Angela Koine Flynn, animation by Tomás Pichardo-Espaillat.
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Text Comments (3259)
Natalie Sheehan (4 days ago)
Basically, skin color means *nothing*
Otakubunny xX (5 days ago)
Even as a tiny kid looking at the globe seeing countries that are hotter/ toward the equator and thinking "oh they get burned by the sun more that's why they have darker skin" "then why are people so critical of what these people do by the tone of their skin?"
Sky High (10 days ago)
The worst animation ever... I couldn t even follow with the information... too much unecessary distraction...
Zeke Elmi (10 days ago)
Chill bro it’s just natural sun cream
Brown skin the tone for me . Saturday February 09, 2019.
Dadson worldwide (11 days ago)
Ever seen a shaved monkey or animal? There pale and it had to take thousands of years to darken enough to protect itself like there hair had. Idk there isnt a single answer to caucasians anciemt orgin and region . I know it's made to be taboo but the available answers arent made public . I hear the science like this and its opposite of what's been observed .
admin8446 (12 days ago)
... except rhodopsin is found not in skin, but in the retina.
Ritika Rajan (15 days ago)
The last sentence ❤
sahithyaa appu (15 days ago)
End to racism is finding a pill that can change a person colour for fair skin
qwecy appiah junior (16 days ago)
lol lol lol lool
qwecy appiah junior (16 days ago)
! !! !!! !!!! !!!!! !!!!!! !!!!!!! what a waste of time
Annichiru! (16 days ago)
Alright I'm loving my yellow-olive skin colour
XuLan J-HOPE (17 days ago)
I love my pale white skin ❤
ᖇᗩᘔ0229 (18 days ago)
But then why're there all color people in South Asia?
Ruchi (18 days ago)
Does that mean darker skinned people are technically more likely to not get cancer from the suns uv rays than lighter skinned people?
GMHannibal (3 days ago)
Riyas N (19 days ago)
Please upload in malayalam
Alyssa Productions (20 days ago)
Alex Williams (22 days ago)
Wow i knew this was gonna go down in the comment section so i did something i usually dont do, i paused the video so i can read the comments... (CAN WE ALL JUST GET ALONG) 😇😇😇
Aaron Spirit (23 days ago)
So thousands of years of separate evolution and the only thing that changed is skin color?
OmMelo (19 days ago)
No things like hair colour and texture have changed nose and skull shapes and many other things.
Guess i got a natural uv protection 😂
Jordan china (25 days ago)
I feel like the earth put humans here for a (reason)
ik (25 days ago)
I love the end part
UsSponser (1 month ago)
The last line was deep
Jose Garcia (1 month ago)
Ramen Noodles (1 month ago)
700 racists disliked
Entoxicated Thoughts (1 month ago)
Even though I have dark skin it’s extremely sensitive so I mean it doesn’t apply to me
Prince Lelouch (1 month ago)
skin colour is not determined by environment
janneth akponi (1 month ago)
janneth akponi (1 month ago)
janneth akponi (1 month ago)
This video has many errors that aren't rue at all
Shadow Soldier (1 month ago)
I’m brown
Austra Robust (1 month ago)
This is why the wall won't work. Southwest is the best environment for Mexicans. 😂😂😂🙏 History comes full circle. That's life.
LJOfficial Music (1 month ago)
how about indian's pakistani's bangladeshi's and Sri Lankans? They're also dark, u never mentioned them having melanin...
Otakubunny xX (5 days ago)
Because Asian, South American/Hispanic and Middle Eastern colors are in the middle of the spectrum and almost irrelevant to the explanation. They only needed to point out the ends of the skin color spectrum
Kaushik Das (1 month ago)
That last line was epic.
Yiğit Ala (1 month ago)
So that's why I get all red and itchy as soon as sunlight touches my skin.
Jel Ew (1 month ago)
Oliver Boo (1 month ago)
Beautiful video
Typical Pro8 (1 month ago)
Some people are lucky because people say I look charcoal and stuff like tha. Then I look at these people that are brown skin and be like "out of the other 7.8 billion people in this world I had to be the really dark one".😭😢 ig Imma live like this for the rest of my life and get picked on a out my ski color(sadly)
FileThis Information (1 month ago)
Correction: Africans migrated to Asia before Europe.
Ednilson Figueredo (1 month ago)
video super educative reall probs to you channel end LIFEFACTS CHANNEL: https://youtu.be/mZg2LKuAhLU for producing the most informative videos on race in youtube
Lucid Dreaming (1 month ago)
what about blue, green, and albino sink? I wanna know the science behind that too.
Super Paleoman (27 days ago)
Albino=no melonin at all
Hiwot Wale (1 month ago)
I love how you guys ended the video
Kawaii Panda (1 month ago)
Sometimes I feel a little out of place with my skin color but it ok cuz when I do braids on my hair and take them out I look like MOANAAAA☺️😂😜
Christine Almaraz (1 month ago)
This was beautiful👏👏👏
xSimplyRadd (1 month ago)
Simply, darker skin tone has more melanin than lighter skin tone.
Sirius Digital Media (1 month ago)
This video is full of theories that are being asserted as if they are all true. Cite references and substantiate. Unsubstantiated claims are not facts.
Super Paleoman (27 days ago)
Ok, Why do people have different colors of skin?
Daniel Levinson (1 month ago)
2:16 - 2:21 That's probably the only fact I didn't already know... Thanks. 👍Great video, BTW!
K 97 (1 month ago)
2 years am now learning 😔
Yaamin Mohmmed (2 months ago)
Melanin ❤️💪🏿💪🏾💪🏽❤️ I love my people ❤️
That Bihh (1 month ago)
+ABC ABC nope
ABC ABC (1 month ago)
I have melanin and im white sooo
Sebastian Feuerstein (2 months ago)
Therefore, Skin color is little more than an Adaptive trait for living on a Rock that orbits the Sun, it may absorb Light but it certainly does not reflect Character 😎
W. H. (2 months ago)
Evolution is a silly theory and not science.
Lolwa Allunicorn (2 months ago)
I’m *YOLO*
Vilo (2 months ago)
The end tho
The Bleach Seller (2 months ago)
applause for last sentence please...
fresh man plays roblox (2 months ago)
but i was born with very pale white skin o0o
fresh man plays roblox (2 months ago)
i geuss i got alot of meliton???
fresh man plays roblox (2 months ago)
i dont sun burn only on my ears and tip of nose ;-;
sebatian (2 months ago)
NO!!!!!!!!!! we are different species...some scientists agree!
Marley Aiden (2 months ago)
hey lady sorry we Africans DON'T have body hair apart from head which is very hard
Super Paleoman (27 days ago)
Because it is hotter in Africa and you need less hair
Brad Wilson (2 months ago)
But in the far north—where low light levels would favor pale skin—the team found a different picture in hunter-gatherers: Seven people from the 7700-year-old Motala archaeological site in southern Sweden had both light skin gene variants, SLC24A5 and SLC45A2. They also had a third gene, HERC2/OCA2, which causes blue eyes and may also contribute to light skin and blond hair. Thus ancient hunter-gatherers of the far north were already pale and blue-eyed, but those of central and southern Europe had darker skin. https://www.sciencemag.org/news/2015/04/how-europeans-evolved-white-skin There are also effects of elevation levels, blood flow, oxygen, iron ..etc.
Ls Vijay (2 months ago)
White people say this is fake.
AK Brahma (2 months ago)
Do afro-americans or afro-europeans have a higher tendency of developing rickets then? Its a curious question, I myself live in the tropics, be gentle if possible.
Super Paleoman (27 days ago)
Absolutely not
Manira Sara (3 months ago)
Luc Turcotte (3 months ago)
Great video! We maybe are all humans, but it's great that we have difference races, cultures and ethnicities. If you we all had the same skin colour, same hair colour, same eye colour, same culture, etc... life would be very boring!
MJade (3 months ago)
(((Okay but also we mixed with Neanderthals / Denisovans and our own selves with varying degrees of albinisms))) But here's what they don't make clear, ever! ... If you're pale you ARE MISSING GENES! Brown skin is not "extra melanin". Because we are not covered in hair!! Therefore default is we are exposed to the sun. Therefore default is melanin! Pale skin on the other hand most certainly is lesssss genetic material !! They make it sound so careful and delicate and adaptive... 😅😬 I'm saying this to the white people who believe they have genes for their coloring (my sis was one of them, and very snooty about it). You dont have blue eyeball pigment! You don't have special gold hair pigment! You have eumelanin not covered by melanin. And lack of pigment in your iris. Simple!😄😄
Super Paleoman (27 days ago)
Unless you are a redhead
The Visionary (3 months ago)
Wasn’t this theory debunked with the current brown eskimos?? 😂
J (3 months ago)
Brown Eskimos is only genetic disorder, has nothing to do with this topic about Sun UV effect on skin
Prem Kumar (3 months ago)
It won't reflects character............nice
J (3 months ago)
That has nothing to do with video...or does it...lol
Candis Jackson (3 months ago)
Wow this is so not true
Maya Thompson (3 months ago)
I wish I was darker... :(
Angel is Incroyable (3 months ago)
3:47 How I know you guys are lying is because you never seen a dark-skinned turn light in the cold weather. NEVER! It's not evolution!!
Samuel kings (2 months ago)
This takes thousands of years to happen lol, plus we leave in a modern society, where we now have sunscreens, air conditioner, houses etc less exposure to direct elements
Angel is Incroyable (3 months ago)
It's not evolution it's genetics. The skin grew lighter because of the genetics degredation.
Janae Young (3 months ago)
Yeah it was a genetic mutation
Angel is Incroyable (3 months ago)
tarozama (3 months ago)
Well....you had me till you said, "evolutionary". Please just stick to what we can prove, not theory.
Super Paleoman (23 days ago)
+tarozama Oh I forgot about you, so yes it can https://www.youtube.com/watch?v=P3GagfbA2vo
tarozama (23 days ago)
+Super Paleoman I'm really hoping to hear a good question. Patiently waiting
tarozama (27 days ago)
+Super Paleoman Yes, and DNA bar coding.
Super Paleoman (27 days ago)
+tarozama Ok, you believe in DNA right?
Star (3 months ago)
See, not only is dark skin beautiful but it’s extremely helpful too ;-;
susa Michael (3 months ago)
How about the hair
Shubhan Ravi (3 months ago)
The last line...👏👏
Anayah Harris (4 months ago)
awwww beautiful video! I love science!
Porscha Bonita (4 months ago)
Love you for this
Letz Talk (4 months ago)
All my skin questions are answered.
Cynthia Sanchez (4 months ago)
So wait, humans were ALL dark skinned once?! ...... Brooooo😮🤯
Laura Beth (4 months ago)
Yeah, Africa is the birthplace of civilization
who am I? Im the doctor (4 months ago)
Why is Donald Trump orange?
Super Paleoman (27 days ago)
Because he has a fake tan
Miu Nguyen (4 months ago)
They didn't explain asians.
ElevenDwarfs 1 (4 months ago)
I hate the stereotypes with the different types of skin tone.
RedOnTheHead - (4 months ago)
Many people think race only has to do with skin color but that really isn't true their are many other physical differences like difference in bone structure and muscle density and many other things even facial features
Edgy Af (4 months ago)
They should teach us this in school right? 🤓
Kayla was here (4 months ago)
we all come from african people my dubs thats why its possible for blacks to have european hair lol and features my dub guy
EyeMaji Nation (4 months ago)
We can thank Carl Linnaeus & Johann Friedrich Blummenbach specifically for the creation and concept of Race and the classification of HUE-Manity into Racial categories..Also for the creation of the word Caucasian of which was placed at the top of the Racial hierarchy which was also used as a means of Social control during the times of Chattel slavery(As well as the present) which lead to forced segregation based solely on skin color as well as social status based solely on skin color here in North America and beyond no wonder a video on the science of skin color which is only touching the surface of who we are!!!
Yasmin Yehia (4 months ago)
That one video that ends racism
hush gully (4 months ago)
eye opener
what is word process? where did it begin? To say that skin was always another color then turn brown
Vann Terry (4 months ago)
Shiuld have had a African American narrator.
Laura Beth (4 months ago)
You..cant even see them? Why does it matter?
AJITH P.J (4 months ago)
Racism is literally Fault in our Star
AJITH P.J (4 months ago)
There is nothing called 'race'. It's just culture.
K Nyansa (4 months ago)
This sounds more like theory rather than facts. Was this white person around 50,000 years ago. Wake up everyone.
Laura Beth (4 months ago)
+K Nyansa ok..? I mean it's not a theory but if you don't accept it do you at least have a reason why, or like, your own theory
K Nyansa (4 months ago)
+Laura Beth white logics is not my logics. I don't embrace eurocentric logics. So eff off
Laura Beth (4 months ago)
You....did you even go to school???
Green 505 (4 months ago)
I like my white skin.
Ja Ich (4 months ago)
Everybody in Europe knows this already. We learn it in school.
The Giant Killers (4 months ago)
And when my mum showed me this, all I could say was "This still doesn't explain why I'm green?" All she kept saying was ask your dad when he gets home...............from Alpha centauri.
HoneyedHylian (4 months ago)
I'm curious - If people moved to cooler, drier areas, why did they never adapt to it? Why do we need constant application of lotions and oils to keep our skin balanced? Also, why are inuits not caucasian. I'm not trying to say anyone is wrong, but I feel like these kinds of questions also need to be observed.
Super Paleoman (27 days ago)
Because you put lotion and oils, just stop doing you maybe get skincencer but it's for the future generations to not get a skincencer
But the sun doesn’t cause cancer.
Laura Beth (4 months ago)
It causes melenomas, yeah my dude.
Kendra Lee (5 months ago)
Don’t trying to be rude but I was just wondering

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