人类肤色为何不同？

发布于 2026-05-24 · 时长 10:02

字幕摘录

时间	英文	中文
0:00	Look at any crowd on Earth and you will see something strange.	看看地球上的任何人群你会看到一些奇怪的东西
0:03	One species.	一个物种。
0:04	Same bones.	同样的骨头。
0:05	Same blood.	血迹相同
0:06	Same basic brain.	同样的基本大脑。
0:07	Same ancient family tree.	同古家树.
0:09	But skin that ranges from very dark brown to very pale pink.	但皮肤从很深的棕色到很苍白的粉红色.
0:12	For thousands of years, humans explained that difference in the worst possible ways.	几千年来,人类以最恶劣的方式解释了这种差异.
0:17	They turned it into myths.	他们把它变成神话
0:18	Then tribes.	后为部落.

展开字幕全文（217 条）

序号	英文	中文
1	Look at any crowd on Earth and you will see something strange.	看看地球上的任何人群你会看到一些奇怪的东西
2	One species.	一个物种。
3	Same bones.	同样的骨头。
4	Same blood.	血迹相同
5	Same basic brain.	同样的基本大脑。
6	Same ancient family tree.	同古家树.
7	But skin that ranges from very dark brown to very pale pink.	但皮肤从很深的棕色到很苍白的粉红色.
8	For thousands of years, humans explained that difference in the worst possible ways.	几千年来,人类以最恶劣的方式解释了这种差异.
9	They turned it into myths.	他们把它变成神话
10	Then tribes.	后为部落.
11	Then empires.	然后是帝国
12	Then race.	然后比赛。
13	They acted like skin color was proof that humans were separated into different kinds of people.	他们的行为就像皮肤颜色证明人类被分离成不同的人
14	But biology tells a very different story.	但生物学讲述了一个非常不同的故事.
15	Skin color was never proof that humans were separate.	皮肤颜色从来不证明人类是分开的.
16	And it was never really about the labels people use today.	和它从来没有真正关于人们今天使用的标签。
17	It was about a problem every human body had to solve.	这是关于一个问题每个人体必须解决。
18	A problem coming from the sky.	问题从天而降
19	The strange thing is that the same thing that kept humans alive was also trying to damage them.	奇怪的是,同样让人类活着的东西也试图伤害他们
20	And over thousands of generations, your ancestors' bodies had to find a balance.	成千上万代人, 你的祖先的身体必须找到平衡。
21	Block too much of it, and you die one way.	堵住太多,你只能死一个
22	Let too much of it in, and you die another.	放太多进去,你又死了
23	So why did humans become different colors?	那么为什么人类会变成不同的颜色呢?
24	The answer begins long before nations, borders, or races.	答案早在国家、边界或种族之前就开始了。
25	It begins in Africa, with a small, exposed, sweating ape standing under a brutal sun.	它开始于非洲, 一个小,暴露, 汗水猿站在残酷的太阳下。
26	For most mammals, skin color is not the first line of defense.	对于大多数哺乳动物来说,皮肤颜色不是第一线的防线.
27	Fur is.	佛尔是.
28	Fur is shade.	富尔是荫.
29	Fur is armor.	富尔是盔甲.
30	Fur blocks sunlight before it ever touches the skin.	毛皮在触摸到皮肤之前会挡住阳光
31	But our ancestors did something dangerous.	但我们的祖先做了危险的事
32	They lost most of it.	他们失去了大部分。
33	Exactly when it happened is still debated.	事情发生时仍然在辩论之中。
34	But the leading explanation is heat.	但最主要的解释是热.
35	A fur-covered animal overheats quickly when it runs in open sunlight.	毛盖动物在露天阳光下运行时会很快过热.
36	A mostly hairless animal that can sweat has a strange advantage.	大多是无毛的动物,可以出汗,具有奇怪的优势.
37	It can keep moving.	它可以继续移动。
38	It can walk for hours.	它可以走几个小时
39	Run for hours.	跑几小时
40	Follow animals across hot open land while other predators have to stop and cool down.	跟着动物穿越炎热的开阔地,而其他掠食者则必须停下来冷却.
41	Sweat works best on bare skin.	汗在赤皮肤上最有效.
42	So early humans traded fur for cooling.	所以早期人类为了冷却而用皮毛交易.
43	But that trade created a new problem.	但这种贸易造成了一个新的问题。
44	Because once the fur was gone, the sky could touch the body directly.	因为一旦皮毛消失,天空就可以直接触摸身体.
45	And near the equator, sunlight is not gentle.	而在赤道附近,阳光并不温和.
46	It carries ultraviolet radiation.	它携带紫外线辐射。
47	UV light is powerful enough to burn skin.	紫外光的威力足以燃烧皮肤.
48	Powerful enough to damage DNA.	足以破坏DNA
49	Powerful enough to break down important molecules inside the body.	强大到足以破碎体内的重要分子.
50	One of those molecules is folate.	其中一种分子是叶酸盐。
51	Folate is a B vitamin your body needs to make cells,	福拉特是乙类维生素你的身体需要制造细胞,
52	repair DNA, support healthy sperm, and support early pregnancy.	修复DNA,支持健康的精子,支持早孕.
53	If too much UV breaks down folate, reproduction becomes harder.	如果紫外线破裂太多叶酸盐就更难复制
54	And in evolution, reproduction is not a small detail.	而在进化论中,生殖并不是一个小细节.
55	It is the test everything has to pass.	这是测试一切必须通过。
56	A body can be strong, fast, smart, perfectly adapted in every other way.	身体可以强壮,快速,聪明,以其他方式完美地适应.
57	But if it cannot successfully leave descendants, evolution does not keep that design for long.	但是,如果它不能成功地离开后代,进化不会使这种设计长期存在.
58	So as early humans lived under intense tropical sunlight,	早期人类生活在强烈的热带阳光下
59	natural selection favored bodies that could protect folate.	自然选择有利于保护叶酸的身体。
60	That protection came from melanin.	保护来自梅兰宁。
61	Melanin is the pigment that gives skin its color.	梅兰宁是给皮肤颜色的色素.
62	But it is not just color.	但它不仅仅是颜色。
63	It is a biological shield.	这是生物盾牌。
64	It absorbs and scatters ultraviolet radiation before that radiation can do too much damage.	它吸收和散布紫外线辐射,以免辐射造成过多的损害。
65	The more dark protective eumelanin your skin produces,	皮肤越暗的防腐乳胶
66	the better protected you are under strong sunlight.	在阳光下保护得更好
67	This is why populations whose ancestors lived for long periods near the equator	这就是为什么祖先在赤道附近长期居住的人群
68	tend to have darker skin.	皮肤变黑
69	Not because they are a different kind of human.	不是因为他们是不同的人类
70	Because their ancestors lived under stronger UV.	因为他们的祖先生活在更强大的紫外线下.
71	Dark skin was not cosmetic.	黑皮肤不是化妆品。
72	It was survival technology.	这是生存技术。
73	It was the first sunscreen.	这是第一个防晒霜。
74	But then humans moved.	但后来人类移动.
75	Slowly, over tens of thousands of years, groups of Homo sapiens spread out of Africa.	慢慢地,数万年来, 同性恋团体从非洲蔓延。
76	They crossed deserts, followed coastlines, moved through forests,	他们穿过沙漠,沿着海岸线,穿过森林,
77	reached cold plains, cloudy islands, mountains, and northern skies.	到达了寒冷的平原、多云的岛屿、山脉和北部的天空。
78	And the farther some groups moved from the equator, the problem changed.	有些群体离赤道更远,问题就变了。
79	The danger was no longer just too much sunlight.	危险不再只是太阳光。
80	It was too little.	这太少了。
81	More specifically, too little UVB.	更具体地说,紫外线太小了
82	UVB is the part of sunlight your body uses to make vitamin D.	紫外线是阳光的一部分你的身体用来制造维生素D。
83	And vitamin D is essential.	而维生素D是必需的.
84	Your body uses it to absorb calcium, build bones, support immunity,	你的身体用它来吸收钙制造骨头支持免疫
85	and maintain normal biological function.	并保持正常的生物学功能。
86	Without enough vitamin D, children can develop rickets.	没有足够的维生素D,儿童可以发育小球.
87	A disease where bones become soft and deformed.	一种骨变软变形的疾病.
88	Pregnancy becomes riskier.	怀孕的风险更大。
89	Bones become weaker.	骨头变弱了
90	Survival becomes harder.	生存变得更加困难。
91	So now human skin faced the opposite problem.	所以现在人类的皮肤面临着相反的问题。
92	Dark skin was excellent under powerful tropical sunlight.	在强大的热带阳光下,暗色皮肤非常出色.
93	But in places where the sun was weak for much of the year,	但是在一年多的时间里太阳很弱的地方
94	too much melanin could block the limited UVB the body needed.	太多的黑色素可以阻挡有限的紫外线身体需要。
95	So in many low UV environments, natural selection favored lighter skin.	所以在许多低紫外线环境中,自然选择倾向于更浅的皮肤.
96	Less melanin meant more UVB could enter the skin.	亚麻素少意味着更多的紫外线B可以进入皮肤.
97	More UVB meant more vitamin D.	更多的紫外线意味着更多的维生素D.
98	More vitamin D meant stronger bones and better chances of survival.	更多的维生素D意味着骨骼更坚固,生存机会更高.
99	This is the part most people get wrong.	这是大多数人错的
100	Light skin did not evolve because cold places are cold.	光皮肤没有进化,因为寒冷的地方很冷。
101	Cold does not bleach skin.	冷不会漂白皮肤
102	Sunlight does.	日光照见.
103	The real map is not temperature.	真正的地图不是温度
104	It is ultraviolet radiation.	它是紫外线辐射。
105	That is why human skin color follows sunlight better than it follows heat.	这就是为什么人的皮肤颜色跟随阳光比跟随热。
106	But the story is still not as simple as dark near the equator and light in the north.	但故事在赤道附近和北方的光线上仍然没有那么简单.
107	Because humans are messy.	因为人类很乱
108	Migration is messy.	移民是混乱的。
109	Diet is messy.	饮食混乱.
110	History is messy.	历史是混乱的。
111	Some Arctic populations, for example,	例如,北极的一些人口
112	did not become extremely pale even though they lived far north.	虽然他们生活在遥远的北方,但他们并没有变得极其苍白。
113	Why?	为什么?
114	Because many of them traditionally ate diets rich in fish and marine mammals.	因为它们中有许多传统上吃着富含鱼类和海洋哺乳动物的饮食.
115	Those foods contain vitamin D.	这些食物含有维生素D.
116	If your food gives you vitamin D, your skin does not need to let in as much weak northern sunlight.	如果你的食物给了你维他命D, 你的皮肤不需要让如此弱的北方阳光。
117	So diet can change the pressure on skin color.	因此饮食可以改变皮肤颜色的压力.
118	That is why there is no perfect skin color chart.	这就是为什么没有完美的肤色图。
119	There are patterns, but not clean boxes.	有规律,但没有干净的盒子。
120	And this is where the idea of race starts to fall apart.	这就是种族观念开始瓦解的地方。
121	Because skin color changes gradually across geography.	因为皮肤颜色在地理上逐渐变化.
122	It does not divide humans into neat biological categories.	它不把人类分为整洁的生物类别.
123	There is no sharp line where one kind of human ends and another begins.	没有尖锐的界限人类的一端和另一端开始。
124	There are just populations whose ancestors adapted to different amounts of sunlight,	有一群祖先适应不同程度的阳光
125	mixed with other populations, moved again, and adapted again.	与其他人口混合,再次移动,再次适应。
126	If you walked from central Africa northward thousands of years ago,	如果你几千年前从非洲中部往北走
127	you would not cross a magic border where humans suddenly changed.	你不会越过一个神奇的边界人类突然改变。
128	You would see gradual shifts.	你会看到逐渐的转变。
129	Different bodies shaped by sunlight, diet, migration, and chance.	不同的身体被阳光、饮食、迁徙和机会所塑造
130	Human variation is real, but the boxes people built around it are mostly cultural.	人类的变异是真实的,但是围绕它建造的盒子大多是文化的.
131	Skin color became one of the most visible human differences.	皮肤颜色成为人类最明显的差异之一.
132	So societies gave it meaning.	所以社会赋予它意义。
133	Then they gave it hierarchy.	然后他们给了它等级。
134	Then they gave it violence.	然后,他们给了它暴力。
135	But evolution never said any of that.	但进化从未说过这些
136	Evolution was solving a chemistry problem.	进化正在解决化学问题。
137	How do you block enough sunlight to protect folate,	如何阻挡足够的阳光保护叶酸盐,
138	but allow enough sunlight to make vitamin D?	但允许足够阳光生产维生素D?
139	That is the whole puzzle.	这就是整个谜题。
140	Too much UV and you need more melanin.	紫外线太多了,你需要更多的梅兰宁。
141	Too little UV and too much melanin can become a problem.	太小的紫外线和太多的黑色素会成为一个问题.
142	Human skin color is the compromise.	人皮色是妥协.
143	A moving balance between protection and production.	保护与生产之间的动态平衡。
144	Between blocking the sun and using it.	屏蔽太阳与用阴阳之间.
145	And the strangest part is that this balance evolved more than once.	最奇怪的是这种平衡不止一次演变
146	Lighter skin in Europe and lighter skin in parts of East Asia	欧洲皮肤较浅,东亚部分地区皮肤较浅
147	did not appear through exactly the same genetic changes.	并没有通过完全相同的基因变化出现。
148	Evolution found similar solutions using different tools.	Evolution使用不同的工具发现了类似的解决方案.
149	That means there was no single moment when humans became white.	这意味着人类变成白人时没有单一的时刻.
150	No single moment when humans became black.	没有人类变成黑人的一刻
151	Those are modern words for a much older, slower process.	对于一个更古老、更慢的过程来说,这些都是现代的词汇。
152	The first homo sapiens were almost certainly dark skinned,	最早的同性恋者几乎肯定皮肤很黑,
153	compared with many people alive today,	以今天的许多人盟誓,
154	because our species evolved in Africa under strong ultraviolet radiation.	因为我们的物种在非洲在强紫外线辐射下进化。
155	But even that has to be said carefully.	但即便如此,也必须谨慎地说。
156	They were not black in the modern social sense.	在现代社会意义上,他们不是黑人。
157	They were ancient humans with skin adapted to strong sunlight.	他们是古老的人类,皮肤适应强烈的阳光。
158	The categories came later.	这些类别后来才出现。
159	Much later, the biology came first.	很久以后,生物学就先到了。
160	Imagine the sun as a problem with two dangers.	把太阳想象成两个危险的问题
161	If it gets too deep into your skin, it can damage folate and DNA.	如果它深入到你的皮肤里, 它会损坏叶酸盐和DNA。
162	If it does not get in enough, you cannot make enough vitamin D.	如果进得不够,你就不能生产足够的维生素D.
163	Melanin is the dial.	梅兰宁是拨号
164	Turn it up where UV is brutal.	在紫外线凶残的地方打开
165	Turn it down where UV is weak.	在紫外线较弱的地方把声音调低
166	Not because one skin color is better.	不是因为一个肤色更好
167	Because different environments ask different things from the body.	因为不同的环境要求不同的东西从身体。
168	That is why no human skin color is the original perfect version.	这就是为什么没有人类肤色是原始的完美版本。
169	Every shade is a solution.	每荫是解.
170	Dark skin is not primitive.	黑暗的皮肤不是原始的。
171	Light skin is not advanced.	浅皮未进.
172	Brown skin is not halfway finished.	棕色皮肤还没有完成一半。
173	They are all records of survival.	这些都是生存记录
174	But then the modern world broke the old rules.	但后来现代世界打破了旧规则.
175	Today, people move across the planet in hours.	今天,人们在数小时内跨过地球。
176	A person whose ancestors adapted to weak northern sunlight can live under harsh equatorial sun.	其祖先适应北方弱太阳的人可以生活在严酷的赤道太阳下.
177	A person whose ancestors adapted to strong tropical UV can live in a cloudy northern city.	其祖先适应强热带紫外线的人可以生活在云雾般的北方城市.
178	Your skin still carries the story of old sunlight.	你的皮肤还带着旧日光的故事
179	But your life may happen under a completely different sky.	但你的生命可能发生在完全不同的天空下
180	Our bodies were shaped by places.	我们的身体是由地方塑造的
181	Our lives are no longer stuck in those places.	我们的生活不再停留在这些地方。
182	And maybe that is the most important part of the story.	也许这是故事最重要的部分。
183	Skin color feels permanent.	皮肤颜色感觉永久.
184	It feels like identity, family, history.	感觉像是身份家庭历史
185	Something you are born with and carry everywhere.	你生来随身携带的东西
186	And it is.	事实就是如此。
187	But it is also evidence of movement.	但它也是运动的证据。
188	Your skin is not just the color of your body.	你的皮肤不仅仅是身体的颜色
189	It is the shadow of ancient migrations.	这是古代移民的影子。
190	It is the trace of deserts crossed, coastlines followed, winters survived,	它是沙漠穿越的痕迹, 海岸线紧随其后, 冬天幸存下来,
191	and sunlight absorbed by people whose names are gone.	阳光被那些名声消失的人吸收
192	People who never knew they were shaping the face of humanity.	永远不知道自己在塑造人性
193	They were just trying to live long enough to have children.	他们只是想活到有孩子为止
194	And over thousands of generations, the sun rode itself into their skin.	千代万代,太阳自成一片
195	So why did humans become different colors?	那么为什么人类会变成不同的颜色呢?
196	Because we left one place and tried to survive in many.	因为我们离开一个地方试图生存在很多地方。
197	Because the same star that gave us life also threatened to damage us.	因为那个给我们生命的恒星也威胁要伤害我们
198	Because evolution had to solve two opposite problems at the same time.	因为进化必须同时解决两个相反的问题.
199	Protect the body from sunlight.	保护身体免受阳光照射.
200	And let sunlight in.	让阳光进入。
201	That is all skin color is.	这都是皮肤颜色
202	Not a ranking.	没有排名
203	Not a border.	不是边界
204	Not proof that humans are separate.	不能证明人类是分开的
205	It is proof that humans are one species flexible enough to survive almost anywhere.	它证明了人类是一个能够灵活生存的物种。
206	A species that began under the African sun,	在非洲太阳下开始的物种
207	spread across the planet,	遍及全球,
208	and carried the memory of those skies on its skin.	并带着那些天空的记忆在它的皮肤。
209	Every shade is a survival story.	每个阴影都是生存的故事。
210	Every color is a map.	每个颜色都是地图
211	And every human alive today is walking around	今天每个活着的人都在到处走
212	with a little piece of ancient sunlight written on their body.	上面写着一块古老的阳光
213	Your body is carrying a much older story than you think.	你的身躯比你想的要老得多
214	And that story did not end in the past.	而那个故事过去并没有结束。
215	If you want more videos like this,	如果你想要更多这样的视频,
216	subscribe now.	现在订阅。
217	There's a lot more buried in being human.	更葬于人间.

该视频共有字幕 217 条。解锁更多字幕为会员功能，请移动到价格

下载安装