And why does what causes it to weaken even occur?
In: 2
In the big picture of things, because there was no evolutionary pressure for humans to live any longer than after child-rearing, we age. Non-reproductive group members that would live to 120 don’t better pass their genes, and old resource-consuming extra tribe members may actually select against the genes of their offspring.
Faster generations are also preferred by evolution itself – why micro-organisms can out-evolve humans and even antibiotics.
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