进化为何不消除衰老？

发布于 2026-07-25 · 时长 8:53

字幕摘录

时间	英文	中文
0:00	The biggest lie we are told about growing old is that it is just basic physics.	我们被告知的关于老化最大的谎言是它只是基本的物理。
0:06	We are taught that the human body is like a car.	我们被告知,人体就像一辆汽车。
0:09	You drive it for long enough, the parts experience	你驾驶它足够长, 零件体验
0:11	wear and tear, the engine rusts and eventually the whole machine just breaks down.	磨损,引擎锈蚀最终整个机器都崩溃了
0:17	It sounds	听起来
0:17	perfectly logical but from a biological standpoint it is completely false.	完全合乎逻辑,但从生物学角度来说,这是完全错误的。
0:22	A car cannot heal its own	车子不能自己治好
0:24	cracked windshield, a car cannot stitch its own tires back together.	挡风玻璃断了车不能把自己的轮胎缝起来
0:28	Your body is not a passive	你的身体不是被动的
0:30	machine.	机器机器电脑

展开字幕全文（143 条）

序号	英文	中文
1	The biggest lie we are told about growing old is that it is just basic physics.	我们被告知的关于老化最大的谎言是它只是基本的物理。
2	We are taught that the human body is like a car.	我们被告知,人体就像一辆汽车。
3	You drive it for long enough, the parts experience	你驾驶它足够长, 零件体验
4	wear and tear, the engine rusts and eventually the whole machine just breaks down.	磨损,引擎锈蚀最终整个机器都崩溃了
5	It sounds	听起来
6	perfectly logical but from a biological standpoint it is completely false.	完全合乎逻辑,但从生物学角度来说,这是完全错误的。
7	A car cannot heal its own	车子不能自己治好
8	cracked windshield, a car cannot stitch its own tires back together.	挡风玻璃断了车不能把自己的轮胎缝起来
9	Your body is not a passive	你的身体不是被动的
10	machine.	机器机器电脑
11	It is a dynamic self-healing organism that is constantly rebuilding itself from the	它是一个充满活力的自愈机体,不断从中重建
12	inside out.	进去吧
13	Your biology absolutely knows how to repair broken DNA, clear out toxic waste and	你的生物学绝对知道如何修复破碎的DNA 清除有毒废物
14	regenerate dead cells.	再生死细胞.
15	If you want proof that biological immortality is possible, look at the	如果你想证明生物不朽是可能的, 看看这个
16	{\fn华文楷体\fs16\1cHE0E0E0}海洋
17	Toritopsis dornei is a tiny species of jellyfish that can literally revert its cells	Toritopsis dornei)是水母中的一个小种类,可以从字面上还原其细胞.
18	back to a youthful state whenever it gets injured or old.	回到年轻时的状态当它受伤或老。
19	It hits the biological reset button over	它击中了生物重置按钮
20	and over again, completely bypassing death.	一次又一次地完全绕过死亡
21	Or look at the Greenland shark, an animal with the	或看格陵兰鲨鱼,与动物
22	exact same vertebrate building blocks as us that routinely lives to be 500 years old.	和我们一样的脊椎动物结构通常活到500岁
23	Nature	性质
24	completely understands how to build a body that doesn't age.	完全理解如何建立不老化的身体。
25	So the paradox is why did evolution	因此,悖论是为什么进化
26	deliberately turn off our repair mechanisms?	故意关掉我们的修理装置?
27	If natural selection's only goal is to maximize our	如果自然选择的唯一目的就是最大限度地实现我们
28	survival, why did it actively engineer a self-destruct sequence into our DNA?	为什么它会把自毁序列输入我们的DNA?
29	To understand that,	为了了解这一点,
30	you have to realize that death by old age is actually a genetic invention.	你必须要认识到老年死亡其实是一种基因发明
31	For the first few	对于第一批
32	billion years of life on earth, organisms were just single-celled bacteria.	生物只是单细胞细菌
33	And bacteria doesn't age,	细菌不会老化,
34	they just divide into two new identical cells, practically forever.	它们只是分成两个相同的新细胞几乎永远
35	Aging was only invented	年老只是发明的
36	when multi-cellular life evolved, and it was invented because of a brutal evolutionary concept	当多细胞生命进化, 它被发明因为残酷的进化概念
37	known as the disposable soma theory.	被称为一次性索马理论.
38	Proposed by British biologist Thomas Kirkwood, the theory	英国生物学家托马斯·柯克伍德提出的理论
39	breaks down the mathematics of biological energy.	打破了生物能量的数学.
40	Every organism has a strictly limited amount of	每个生物体都有严格的有限数量
41	to split that energy between two things, repairing its own body, the soma, and reproducing.	将能量分成两样修复自己的身体苏玛复制
42	Evolution	进化
43	forces a trade-off.	强迫取舍。
44	If an animal spends 100% of its energy repairing its own cells, it lives forever,	如果动物用100%的能量修复自己的细胞, 它将永远存在,
45	but it doesn't have any energy left over to make babies.	但是它没有留下任何能量来生孩子。
46	If it has no babies, a predator will	如果它没有孩子,就会有掠食者
47	eventually eat it, and its genetic line goes extinct.	最终食用它,其遗传线也随之灭绝.
48	So natural selection struck a ruthless	所以自然的选秀打击无情
49	bargain.	讨价还价
50	It decided that the most efficient way to pass on genes is to invest heavily in reproduction,	它决定传递基因的最有效方式是大量投资繁殖,
51	and only invest just enough energy into repairing the body to keep it alive until the babies are	并且只投入足够的精力修复身体让它活着直到婴儿出生
52	born.	生来.
53	Evolution doesn't view your body as a permanent temple, it views your body as a disposable	进化不把你的身体看成是永久的神庙它把你的身体看成是一次性的
54	temporary vehicle.	临时车辆。
55	Once the vehicle successfully delivers the genetic payload to the next generation,	一旦飞行器成功将基因载荷交付下一代,
56	evolution stops paying for the maintenance.	进化停止支付赡养费。
57	Biologists call this the selection shadow.	生物学家称这为"选择的影子".
58	Natural selection is incredibly powerful, but it is entirely focused on getting you to reproductive	自然选择是惊人的强大,但它完全专注于让你生育
59	age.	年龄
60	If a genetic mutation causes a fatal heart defect in a 10-year-old, that mutation is violently	如果基因突变导致10岁婴儿的致命心脏缺陷,该突变是暴力的
61	scrubbed from the gene pool because the child will never pass it on.	从基因库中清洗出来因为孩子永远不会传出去
62	But what if a mutation	但是,如果一个突变
63	causes severe Alzheimer's disease at age 80?	80岁时引起严重的老年痴呆症?
64	By the time the Alzheimer's triggers, that person	等阿尔茨海默症发作的时候那个人
65	has already had children and passed the gene to the next generation.	已经生了孩子,并将基因传给下一代。
66	Because the biological damage	因为生物损害
67	happens after the reproductive window has closed, natural selection is completely blind to it.	发生在生殖窗口关闭之后,自然选择是完全盲目的。
68	It	这个
69	drops you into a shadow where late-life genetic flaws are allowed to silently accumulate.	让你陷入阴影晚年遗传缺陷被允许默默积累
70	But the	不过
71	you get old, it actively trades your future health for your present survival.	你变老了, 它积极用你未来的健康来换取你现在的生存。
72	This brings us to the	这让我们来到
73	most vital concept in aging research, antagonistic pleiotropy.	衰老研究中最重要的概念对抗性多肽
74	This theory states that natural	这个理论说:
75	selection will actively favor a gene that gives you a massive survival advantage when you are young,	选择会积极支持一个基因让你在年轻时拥有巨大的生存优势
76	even if that exact same gene destroys your body when you are old.	即使你老了同样的基因也会毁掉你的身体
77	The ultimate chilling proof of this	最令人寒冷的证据
78	is happening inside your cells right now with a specific gene called TP53.	现在发生在你的细胞里有一种叫做TP53的基因
79	TP53 is often called	TP53常被称为
80	the guardian of the genome.	基因组的守护者
81	It is one of the most important tumor suppressor genes in the human body.	它是人体中最重要的肿瘤抑制基因之一.
82	When you are in your 20s and 30s, your cells are constantly dividing and sometimes they make	当你在20到30岁的时候你的细胞会不断分裂有时它们会
83	mistakes.	错误。
84	When a cell starts mutating and threatens to turn into a deadly cancer,	当一个细胞开始突变并威胁会变成致命的癌症,
85	TP53 spots it and triggers a process called cellular senescence.	TP53发现了它,并触发了一个叫做细胞诱因的过程.
86	It permanently disables the	它会永久禁用
87	cell so it can never divide again.	单元格,这样它就再也分不开。
88	This mechanism is a biological superpower.	这种机制是一种生物超能力.
89	It is the reason you	这是你的原因
90	don't instantly die of aggressive cancers in your youth.	别在青春中立刻死于强暴性癌症
91	But there is a fatal catch.	但有一个致命的捕获。
92	Over decades,	几十年来,
93	as TP53 ruthlessly locks down damaged cells to protect you, those senescent cells start piling	由于TP53无情地锁住受损的细胞来保护你,那些有潜质的细胞开始堆积
94	up in your tissues.	在你的组织。
95	Biologists call them zombie cells.	生物学家称之为僵尸细胞.
96	They refuse to die but they stop doing	他们拒绝死,但他们停止做
97	their jobs and worse, they secrete highly toxic inflammatory chemicals into your bloodstream.	更糟糕的是,他们把剧毒的煽动性化学品分入你的血液
98	By the time you are in your 70s, your tissues are absolutely swamped with these toxic zombie cells,	70多岁的时候,你的组织已经充满了这些有毒的僵尸细胞,
99	draining your stem cell reserves and directly causing cardiovascular disease,	消耗干细胞储备直接引起心血管疾病,
100	arthritis and organ failure.	关节炎和器官衰竭。
101	The exact same cancer-fighting mechanism that saves your life	同样的抗癌机制拯救你的生命
102	at 25 is the mechanism that causes your organs to decay at 75.	25是导致你75岁器官衰变的机制
103	Evolution looked at that trade-off	进化看这种权衡
104	and accepted it.	并接受了它。
105	It happily traded your late-life health to ensure you survived long enough to have	它很高兴用你晚年的健康来保证你活得够久
106	kids.	孩子们
107	But this brings us to the ultimate question.	但是,这给我们带来了一个最终的问题。
108	If we have the technology in the future to cure	如果将来我们有治疗技术
109	these diseases, to clear out the zombie cells and to turn the repair mechanisms back on	清除僵尸细胞恢复修复机制
110	permanently, what would happen if humans actually achieved biological immortality?	如果人类真的实现了生物长生不死会发生什么?
111	In the 2020s, researchers at Harvard's Wise Institute and the New England Complex Systems	20世纪20年代,哈佛智慧学院和新英格兰综合系统的研究者
112	Institute ran massive spatial computer simulations to answer this exact question.	研究所进行了大规模的空间计算机模拟以回答这个确切的问题。
113	They built an	他们建造了一个
114	artificial environment with limited resources and gave the simulated organisms the genetic	人造环境,资源有限,使模拟生物具有遗传性
115	ability to live forever.	能够永远活着
116	The results were catastrophic.	结果是灾难性的。
117	Without aging, the immortal	没有衰老,不朽不朽
118	individuals never died.	个人从未死亡。
119	They just kept consuming food and taking up physical space.	他们不停地吃东西占用物理空间
120	Because they	因为他们
121	refused to leave, they completely out-competed their own children.	拒绝离开,他们完全失去能力自己的孩子。
122	They drained the local	他们排水了当地人
123	environment of every available resource.	每一资源的环境。
124	The population collapsed and the entire lineage	人口崩溃,整个血统
125	starved to death and went extinct.	饿死后灭绝.
126	The computer models revealed a deeply profound reality.	计算机模型揭示了一个深刻的现实.
127	For a species to survive long term in a world with limited resources, natural selection must enforce	在一个资源有限的世界中,一个物种要长期生存,自然选择必须强制进行。
128	an optimal limited lifespan.	最佳的有限寿命。
129	An active mechanism of program deterioration is mathematically	程序变质的主动机制在数学上
130	required to prevent a generation from destroying the resources needed by its descendants.	防止一代人破坏后代所需的资源。
131	When you look at the absolute cutting edge of evolutionary biology, the paradox of aging vanishes.	当你看进化生物学的绝对前沿时衰老的悖论就消失了
132	You do not age because your cells are just too fragile or because the universe is wearing you	你不老是因为你的细胞太脆弱还是因为宇宙穿戴着你
133	down.	下来
134	You age because evolution deemed your eternal survival less important than the survival of your	你年龄大是因为进化论认为你的永生不如你的生存重要
135	children.	孩子们
136	The warranty on your biology expires because the energy required to keep you young	你的生物学保修期已过因为需要精力让你年轻
137	is better spent creating new life.	最好是花时间创造新的生活。
138	Aging is not a disease, it is not a mechanical failure	衰老不是疾病,也不是机械故障
139	and it is not an accident of physics.	这不是物理学的意外
140	It is the ultimate evolutionary sacrifice.	这是最终的进化牺牲。
141	Our bodies are	我们的身体
142	intentionally designed to fade away, stepping aside, so the next generation has the space,	故意要淡出弃之不顾所以下一代有空间
143	the resources and the chance to survive.	资源和生存的机会。

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