Meh. Dinosaurs were a long, long time ago. Convergent evolution is a thing. Last I heard, the notable causes of death for ~95% of human history were disease, trauma (both accidental and malicious), and famine. "Eternal youth" would save you from zero of those - and the very high base metabolic rate of warm-blooded mammals makes famine a far greater threat than it is for cold-blooded animals.
Plus, skimming through Wikipedia's list of the longest-lived organisms, I notice a dearth of social animals. Natural selection and evolution work somewhat differently in social animals - and the potential downsides of having a "bad" king / chief / matriarch / alpha leading your group for 200 years may far outweigh the potential upsides of having a "good" one for that long.
I imagined humans got feeble when old because, socialization of the young?
See, once you had social animals that communicate in detail, it became positively selected for limiting the activity of the old. They would then congregate with the others in the village around the fire - the young. And tell them things.
The whole community would benefit. That's all it takes to cement something into genes.
My guess is that it has more to do with being warm blooded. The longest living species are all cold blooded. Being warm blooded probably means having to deal with lots of reactive oxygen species being generated by the fast metabolic rate, that ends wrecking havoc in the bodies of ageing mammals.
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[ 4.9 ms ] story [ 23.6 ms ] threadhttps://www.quantamagazine.org/hyperuniformity-found-in-bird...
Plus, skimming through Wikipedia's list of the longest-lived organisms, I notice a dearth of social animals. Natural selection and evolution work somewhat differently in social animals - and the potential downsides of having a "bad" king / chief / matriarch / alpha leading your group for 200 years may far outweigh the potential upsides of having a "good" one for that long.
See, once you had social animals that communicate in detail, it became positively selected for limiting the activity of the old. They would then congregate with the others in the village around the fire - the young. And tell them things.
The whole community would benefit. That's all it takes to cement something into genes.
> Compared to other mammals, humans have a long life.
Being a social animal is irrelevant.
This could be in dispute, but there does seem to be evidence to suggest this.
Although how long did hot blooded dinosaurs live for compared to cold blooded ones.