The Biology of Skin Color - HHMI BioInteractive Video
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- čas přidán 19. 07. 2015
- Penn State University anthropologist Dr. Nina Jablonski explains how different shades of skin color arose as adaptations to the intensity of ultraviolet radiation in different parts of the world.
This film is appropriate for science classes from middle school to college. The content connects to key concepts in biology, human biogeography, genetics, and anatomy and physiology. Chemistry and biochemistry classes will appreciate the focus on the effects of UV radiation on DNA, folate degradation, and vitamin D synthesis.
To find classroom resources for this film and other materials, go to www.hhmi.org/biointeractive/bi... - Věda a technologie
"To eradicate racism, is not for us to become color blind but to see the beauty of a colorful World" n this is the TRUTH
Racism was a word no other people knew until white people put it out there and pointed out the differences between people so in my opinion to eradicate racism you got it eradicate the word and the thinking of the individuals who first believed it.
I have traveled and live around the world most of my life. First I learned to respect their country, their religion, the man and his family. Then you see past stereo thinking to an appreciation of the person. And learn a few word of courtesy. After all that, I don’t have a problem back home in my mixed environment.
@@RickyGuttasouffCollins The fact that you assume that all white people hold the thinking of racism is astonishing
But then you'll have classism
@@cannapurp2833 I never said all white people are racist what I said was white people initiated the word racist it was part of their lexicon before anybody else was aware of it because they pointed out the differences among people so again how did you get that out of what you just assumed.
special edition: like if ur here cos of QUARANTINE bio class
Quarintine AP class
Ap bio virtual case study lmao
i watched this for fun what are u talking about 👀😳
Dudeeeee
science class
Nobody:
Half the people in the comment section: iM hErE bEcAuSe Of BiO cLaSs
Im auctually here for Physiology
Im here for anatomy and physiology
here for earth science
same bro we litaral twins
I need the reflectometer so I can finally buy the right foundation.
AMEN, SISTER!
HoneyedHylian 😂😂😂😅girl stop it no I’m can’t match it up my self It’s sad u can’t find foundation pretty as our skin is
You don't need any makeup! Be yourself and love your own natural self.
james charles needs it
That's exactly what i thought lol
“We are one under the sun”. This summarising phrase sums up your message concisely and precisely. Thank you ❤️💐
Thomism 101: agree 100%!
Africans are light beings Europeans are ice beings
well thats not true and thats the point of the studie lmao
Skin color is a product of our evolution, and should never have been judged as something good or bad.
Culture and traditions are the real issue. It categorizes people. Instead of judging based on individual character, people judge based off culture. Especially when cultures have bad characteristics. Therefore individuals should not participate in cultures and traditions that are harmful to ones individual character. That's the message from Jesus in the Bible. Dont follow traditions and Religions. No one listens to that message.
@@dustinellerbe4125 ummmmm ok
Never!
@@dustinellerbe4125 ...ok?
I like spaghetti and cookies and cream ice cream........thats all i have
this video seems to be very popular among bio teachers, huh? thats why im here after all
lmfaooo
ahahah yess
lesson of the day: stop being racist, skin color doesn't make you superior, it just adapts you to the environment where u live.
wrong
DILF GRiM Your wrong.
@@thedrifter3938 your wrong
Lesson of the century*
*buzzer sound*
When you come for biology, but actually really enjoy the subject matter and have a fun time learning.
Me 🙋
I'm here for anthropology, but this is still so interesting like, dang I didn't know reproduction was also affected by UV radiation like that
I was fascinated by this too.
my school ruined science for me
17:03 , 13:42 and 11:42 Has the answers for ur bio hw questions. Ur welcome :)
Ty for the timestamps
I was just watching this off of pure interest. 😂. Everyone else is here for class
Me too
SAMEEE
Nothing new. Their talking about the work of Cheik Ants Diop. The Black woman the begining of it all.
Why you have full body hair in a hot climate. What time is she talking about?
LMFAOOOOO same
Bioclass is lucky they're even learning this. Good luck in the future world! Make it a better place
CEO of ending racism
shut up chris
NO Body CAN EVER END RACISME, THAT DEFINES WHAT WE ARE, THE OTHERS HAVE SKIN LIKE PIGS AND THE OTHERS NOT, AND THIS CAN NEVER ENDS
@@asaaseafua9606 LOL it’s not about skin it’s about class ….
@@asaaseafua9606 races doesn’t exist
@@asaaseafua9606 bruh calm TF down
Everyone seems to be here for bio, but where's my anthropology gang?
What’s up?!
I like both
Am I late for the gathering?
anyone wanna link me to their essay abt this 😔
it me!
I'm sometimes struck by the response I get from some of my peers when I ask them "Why do you think people with darker skins tend to be located in regions near the equator?" I recall asking one friend this and his response to me was "Genes". I then asked "Why do you think they have THOSE genes?". It seemed that variations in skin color as an adaptation - rather than some random fluke - escaped him. Watching this video, I learned something NEW about skin color. I used to think that fairer skinned people simply LACKED a certain DENSITY of melanin that would otherwise make a person dark. I didn't realize there was another COLOR of skin melanin. Interesting!!
agreed! same here
I’m not here because of bio class. I just smoked a blunt and now I’m ready to go down a rabbit hole 🕳
😭😭R.I.P
Lmao im here for class but im high asf 😂
Same
I must say, that sounds much better than going down a rabbit whole.
girl u ate with that "we are one under the sun", i feel inspired
Thank you for making this wonderful documentary! So many more people should watch this and learn from it.
Glad you enjoyed it!
I'm a dietitian and a teacher at a university, and this video was INCREDIBLY useful to understand the relation between our ancestors, where they lived, our skine tone, where we live, and our diet with the production of vitamin D. Thank you!
I must've increased my vitamin D...never noticed til I started taking D3 for arthritis & bulging discs.
gotta vacation more in a warmer climate , it really help.
Still relevant. I enjoyed reading the comments from mostly bio students with the exception of a few jokesters who were actually funny. This needs a reboot. Comprehensive and necessary right now.
everyone: "anyone here for bio class"
me: ......I'm here for physiology class lol
They should show this film in schools all over the world.
Definitely NOT gonna happen... Lol
@@thelite63 well my school just showed up this
Where my anatomy gang at tho?
was looking for this🙂
right here lmao
3:14
so y'all really just gonna unite over school classes? respect, respect lol i'm here for introductory general bio for uni xD
This channel is really helping me with my anthropology class! Thank you!!! :)
Yo if we're all here for the same reason just drop the answer key
Ay bro can you drop it?
Luckily most of your Biology teachers use their own versions of activities to support the learning from this video. So, there isn't just one answer key out there! Best of luck to each of you in your classes! Honestly watch this video! Might make you rethink some of your own thoughts!
@@amandafricke9745 u prbly a teacher:(
@@amandafricke9745 who is telling you this? Are you being held gunpoint by ur bio teacher?
Really though. I'm stressed as it is, can someone please drop the answer key
Let me guess your here for bio class during quarantine
This was truly uplifting to watch. How I wish such a presentation could have been part of my school upbringing as young teen.
had to watch this today in bio and we had to take notes but i wasnt paying attention so im here now lol
I a light note, I always tell my children there is no black people or white people, we are just different shades of the same color. Turns out thinking this way was correct. Another aspect of this doc is the mention of other species and how melanin plays a role. It is simply a part of life that helps with adaptations to our environments and nothing more. It is beautiful.
i'm seein a lot of "i'm here for bio" and not enough "i have the answer key if y'all need it" and it's quite disrespectful
Ong tho
this is wtf I'm saying. honestly its just 3 questions but yall not gonna have my back? lmao
17:03
@@iinviishxnii7735 3 questions? luckyyyy my class has like 15 questions
5:02 Isn't that where 2012 Captain fought with 2019 Captain in endgame? Looks pretty similar...
I thought the same thing lmaoo
YOOOO
we got geniuses in here..
@Marko Blanco @Kvidd Nya
These comparisons : You can do this all day... I know.
Very intriguing. Well structured argument. Could have been bits longer, but anyway essence of evolution or evolutionary phenomenon is described beautifully.
weirdly, I'm here for my nutrition class.... anyways
when she said that skin color should never have been judged as something good or bad.... YES MISS MAMA ending racism over here
She got it correct!! All human began with "DARK" skin!!!
I love black girls
So, your skin color tells you the type of climate to which you are adapted?
Everybody here for biology
Me here for A&P: 👁👄👁
wtf is a&p
@@nchan602 anatomy and physiology
Do a report on albinos. You will learn much more.
This video confirms and puts names to face what I always believed as an adult about the human species when it comes to human skin.
Someone write a summary of this vid to help with everyone’s bio class
Love this. I use it with HHMI's wonderful skin color lab. My students learn evolution, how to interpret data, AND the process of science all in one lab activity.
Great piece. Thank you.
I knew about the connection between the need for vitamin D, the adoption of an agricultural (plant) based diet while living in latitudes far from the equator and paler skin. However I have now learned about how sunlight can break down folate and the need for darker skin (in equatorial latitudes) to preserve this nutrient in the body. Thank you
Outstanding video, and educational. People can take from it as they want. I love the quote We are one under the sun, because we are.
LeGoatBronzo tell them to call you Daddy 😊
hi CREE please get the book by "Carl Barnes Melanin the key to black greatness" online
@@wa57s577 What is LeMickey doing here
We're not one under the sun
I’m not color blind I appreciate the beauty and diversity of mankind
Color blind is the best way to end recism
Love this video, especially on the part where it said the truth, that humanity started near to the equator in the African continent, where we were all dark-skinned and then some of us moved to different parts of the world further away from the equator where the colder that part of the world was the lighter our skin got. So we evolved from the dark skin complexion. If this was to be thought or mentioned more, it will make a big difference in our daily living. It will teach us to look upon the black race who the world thought you to hate. To admire, respect, and see them as brothers & sisters has how God wants us to see each other. Be in peace and harmony.
But like how evil mankind enrichens his-self off of trials and wars, they rather keep us hating one another, by keeping the all lies History books in the whole worldwide school systems; Has they have done for over 500 years.
So is time for us to stop teaching History (His-Story) and start preaching the Truth!
Black eayo
How care
Africans are humanity’s Grandparents- Indians our Cousins and Europeans our children- skin only got lighter 6,000 years ago! There was a change in our biosphere system- before we had a vapour canopy- then there was a deluge - flood which changed everything.
History doesn't really conflict with science already
Such a great film. Can't wait to show this to my 8th graders!
the most complete documentary on the adaptation of human skin to climate
This video is amazing! Thank you so much who made it, I will use it in my lecture on genetic variation and change, as well gene expression with a focus on human race. I am sure my classes will enjoy it.
This is the most informative and important information I've seen in awhile. What took bio-science so long to share on line??
What a great little documentary. Thankyou.
This is Librul propaganda.
Dr. Jablonski, I want to thank you and all of your colleagues for doing such great work. Your research and findings may be the key to curtailing racism and faulty conclusions about skin complexion and human value.
when it's quarantine and your entire anthro class is just made up of youtube videos
I took that class the semester before the virus and it was still heavy on the videos. We mainly watched parts from Becoming Human though. I'm watching this now thanks to online Bio. Lol
Used this for my bio class
If you are here from Ms. Nicholson's Biology class, and want to leave an annoying comment, could you at least spell words correctly and write in complete, punctuated sentences? It is important to be consistently literate throughout your day...whether you are quarantined or not. Thanks...now watch this video because it is really well done.
@Kelly Nicholson
Great explanation of Skin color . More people should see it . I love your scholarly scientific research behind the video . Yet you made it simple to understand for all. This video should be in all school districts and part of the science / biology curriculum.
Unless we dismantle the GOP, there soon won't be any science at all in schools...
A beautiful explanation of the sound science of why we are all one. THANK YOU!
Fue muy interesante muchas gracias
Excellent video!
Yes but how do you explain facial features & hair types?
Funny thing, I'm also here because of Bio class, but I raised the question of human skin color as either adaptation or evolution, and the professor decided to add this assignment.
So in short, I'm here because of bio class and because I couldn't keep my mouth shut.
Hey but what about tanning? I was obligated to watch this, but hey, it's actually pretty interesting!
Very informative.Is it just me or did the host change colors during this presentation?
I love anatomy right now it’s great
Skin Cells
What is the function of keratinocytes?
Provides skin structure and in functioning of the immune system
What is the function of melanocytes?
Producing melanosomes that determines the type of melanin.
Melanin
Melanin is a pigment that is produced in organelles called in specialized cells called melanocytes.
What are the two primary types of melanin and how do they differ?
eumelanin and pheomelanin.
Explain how the amount of eumelanin and number of melanosomes differ between a person with lighter color skin and a person with darker color skin.
Reddish-yellow pheomelanin is more abundant in lightly pigmented people. Brown-black eumelanin is more abundant in darkly pigmented people. (more eumelanin=dark skin)
How Does Melanin Protect Cells?
Name the molecule in the body cells that UV radiation can damage.
Skin cell DNA
How does melanin protect these molecules from UV damage?
By forming supranuclear caps that absorb UV around the nucleus
Vitamin D
Why is vitamin D important to our health?
Because without vitamin D, humans cannot absorb calcium that builds the bones and healthy immune system.
What is the connection between skin, sunlight, and vitamin D ?
Our skin receives UVB that comes from sunlight which provides vitamin D for our body.
What are the positive and negative effects of UVB exposure?
UVB exposure is critical for the synthesis of vitamin D, but the amount of vitamin D that can be received from UVB is greatly dependent on the latitude.
There are a lot of different kinds of beautiful!
Thank you for the information
Is there also an explanation, why people change their hair/skin colour over time? Like 1-30 Years.
That's right no one should'nt make fun of ppl skin color because we are ONE
Natural Bby true
That is a double negative.
Tell that to my sister. I'm very fair. She called me so many names as I was growing up.
You can't deny the physical and psychological differences between races
@@frankserratos5022 i think that has more to do with Neanderthal and Denisovan admixture
Love this. A little education can go a long way in society!!
That's so true!
Here because of my principle of genetics class. I love it
How do you account for different features of various races, like long nose, slanted eyes, thicker lips?
This is a great video. I thought I knew it all already, but I learned a lot about the question why are we all different colours.
This video was VERY well produced!😊👍🏾🔬
I noticed they used the Peterson map!
i have a question????what is genotype ratio of inheritance of skin color in human's?
I'm here because this was in the recommend of a video about Galapagos finches. No school for me!
Ironic bc we just finished the finches in school and moved on to this for our final
Excellent info. and agree with others here who've said this should be required for ALL young school children to avoid any lingering bigotry and false ideas. All humans belong to one race, the human race, and all are various shades of brown, no white, no black, just brown to tan.
THANKS FOR THIS WONDERFUL INFORMATIVE VIDEO!
Glad it was helpful!
Fantastic!
Tess is an icon. Absolute icon.
More people need to see this video. Its very interesting stuff. One race the human race
It's being circulated in university biology classes. These classes are general education science so the classes are much bigger. :)
Nolan Taylor No it's not. It ignores the nomadic tendencies of humans. The various places humans find themselves wasn't their origin. Thus, they traveled to those places. What she's suggesting is more tail wagging the dog or egg and chicken. She's ignoring genetic findings and positioning whites as first humans while ignoring that scientists including geneticists are clear that the gene mutation(s) that caused white skin is very recent, as in the last ten thousand years. Humans losing hair and being white underneath is nonsense. Gene mutation (which is what causes white skin) isn't adaptation or evolution. White skin and lighter colored skin is caused by malfunctioning melanocytes. There are so many things wrong with this video.
During our evolution, pre-modern human, our skin was predominantly white underneath our fur.
It isn't a malfunction. Melanin has been in us since the very beginning, and changes throughout time pending its use. At some point, while 'civilizing' ourselves, we developed the lighter tone again. Diet must play a much bigger role than we previously thought and UV isn't the tell-all
For example; the first Europeans were dark-skinned with dark hair, but blue eyes. They lived in northern latitudes and a cold environment for tens of thousands of years and never lightened. We still don't know why
+R.A. Raphael She says that dark pigmented skin was in the beginning, in Africa along the equator where the sun is so strong. As humans traveled North, they eventually lost pigmentation in their skin; which allowed vitamin D to be processed more easily from low light. She mentioned white skin under the hair like other primates BEFORE we were truly human. The skin would become darker without the hair as protection. This is a form of evolution. Not sure why this offends your ego; or why you turn it into a race issue.
Sources?
I came here for bio a few years ago. And I've returned for English of all things!
Most are light beige to the darkest brown. Medical conditions and vary outside of this spectrum.
The map shows that Australia had a mid range UV exposure, yet the Aboriginal people are one of the darkest races on Earth ? What has happened there......?
high altitude in the aboriginal area means they are closer to the sun, thus more UV exposure and darker skin.
The southern hemisphere is generally warmer due to less land mass and more sea area, so if it wasnt for the offset and slowed effect of biological evolution due to thousands of years of shelter and temperature mitigation tools white Austrailians would eventually turn nore dark over the next 100,000 years or so. But humans have slowed, if not stopped, most biological evolution due to creating new tools to mitigate effects of climate such as shelter since the starting of "civilization" about 10,000 years ago, after the vast majority of human migration.
Camouflage for Drop Bear attacks in the dead of night...
@@lhaviland8602yhhhh... because there is no such thing as the night in Europe 🤦🏿♂️
Who has my anatomy answers
gotta love biology class
I liked it when she started of with 'rich brown skin'😂😂😅👊🏿big up Nina
Here out of curiosity ♥️
This video helped my insomnia:) put me right to sleep💙 thank you!
Concentrating on skin color ignores all the other ways the races or genotypes differ. What does the epicanthic eye fold have to do with UV light?
fascinating!!
08:39
Australia has beige toned Native Australians?
I'm not sure if this map is correct because Aborigines are very dark. Recent Australians are immigrants from Europe and Australia is mostly a desert.
I think that's just a "predicted skin color" map, you can see it earlier. Also they measure people's skin colors in areas that don't tend to be exposed and tanned that much, like people's under-arms, so it's paler than the rest of their skin.
But I don't know why they'd put a "predicted skin color" map on there instead of one of the actual results.
This is just a bs video period she’s trying to say that the original humans had pale skin and darker skinned human came millions of years later…
so no ones tryna post the answers to the questions about this video? aight
Superb video
One new fact I learned from the "Biology of Skin Color" HHMI BioInteractive video is that the variation in human skin color is primarily due to the amount of melanin produced by melanocytes in the skin. The video explains that melanin, a pigment molecule, is responsible for the different shades of skin color observed in humans.
Melanin comes in two main types: eumelanin, which is brown-black in color, and pheomelanin, which is yellow-red. The ratio of these two types of melanin, as well as the distribution of melanin in the skin layers, determine an individual's skin color.
Furthermore, the video highlights the evolutionary factors influencing skin color variation. For instance, populations living closer to the equator tend to have darker skin tones, which provide better protection against harmful UV radiation. In contrast, populations living in regions with less sunlight tend to have lighter skin tones to facilitate the synthesis of vitamin D.
Overall, the video effectively illustrates the biological mechanisms behind skin color variation and how evolutionary pressures have shaped these differences across human populations.
5:49 - 9:08
9:08 - 12:19
12:19 - 13:32
16:04 - end
Just some time stamps for the worksheet we have to do, someone else might need em :)
Legend
Skin.
Keeps you in.
There was another evolution of skin. Changing pigmentation. I know because my skin changes from brown to white. Two months on the beach during summer used to give me darker (not tan) pigmentation. After Summer when I went back to school I would lighten up in a couple of months.
What about the difference of nose structures?