为什么进化没有充分的理由将我们的寿命延长到比现在更长的时间呢? Claire Jordan 的回答火了

2020-11-01 00:29

Why does evolution have no good reason to extend our lifespans any longer than they are now? 2kj世界播

为什么进化没有充分的理由将我们的寿命延长到比现在更长的时间呢?2kj世界播


Answered by: Claire Jordan,worked at National Health Service 2kj世界播

回答者:克莱尔·乔丹(Claire Jordan),在国家医疗服务中心工作2kj世界播


In a state of nature humans would usually have died by about 35. 2kj世界播

在自然状态下,人类通常会在35岁左右死亡。2kj世界播


The mechanism of evolution is that the more you pass on your genes to the next generation, the more common your genes will become, so that if you are especially good at passing on your genes the population will gradually become more like you. 2kj世界播

进化的机制是,你把你的基因传给下一代越多,你的基因就会变得越普通,所以如果你特别善于把你的基因传给别人,那么这个群体就会逐渐变得更像你。2kj世界播


Let’s say you are a rabbit. You are a prey species, and will almost certainly have been killed and eaten by something before you are three. If you are going to be dead before your third birthday, how does it improve your chances of passing on your genes to have the *potential* to live to 20? There’s no selection pressure to increase a species’ maximum lifespan much past its modal lifespan. 2kj世界播

让我们假设你是一只兔子。你是一个被捕食的物种,几乎可以肯定在你三岁之前就已经被什么东西杀死和吃掉了。如果你在三岁生日之前就去世了,如何才能提高你的基因遗传到20岁的“潜力”的几率呢?没有选择压力来增加一个物种的最长寿命,远远超过其模式寿命。2kj世界播


We can see this demonstrated by the naked mole rat. Naked mole rats spend almost their entire lives underground and so are strongly protected from most dangers. Because of this, a longer potential lifespan does actual translate to a longer actual lifespan in which they have more chances to breed, so selection pressure for them does favour a longer life, and they live ten times as long as most rats of their size. 2kj世界播

我们可以从裸鼠身上看到这一点。裸鼹鼠几乎一生都生活在地下,因此受到强有力的保护,免受大多数危险的伤害。正因为如此,更长的潜在寿命实际上确实转化为更长的实际寿命,使它们有更多的繁殖机会,所以对它们来说,选择压力确实有利于更长的寿命,而且它们的寿命是大多数体型相同的老鼠的10倍。2kj世界播

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