https://journals.sagepub.com/doi/abs/10.1177/074873049701200205 … very weird: nonhuman primate lives 9-10 seasonal photoperiod cycles (days getting short and then long again) and if you speed up those cycles its lifespan drops 30%. If you slowed down the photoperiod cycle could you *increase* lifespan?!
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it depends; some organisms do stay fertile through their lifespan. If aging has an "unavoidable" component ("wear and tear", "entropy", "oxidative stress", etc) such that children of older parents are less likely to survive, then there's an evolutionary incentive to *add* ...
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