@oakreef Interesting! Both long lived, highly social, cultural.
I've seen it convincingly argued that menopause is a social trait, allows the most experienced members of a group to share attention/experience with the youngest generation. In humans, given the extraordinarily high mortality rate of women in childbirth, probably also drastically improved life expectancy for the most valuable minds in a community.
@oakreef @tfb Which in turn might be an artefact of Whales and Humans being so long-lived.. I wonder if the mortality rate of great apes were lower, would we observe a proportionally similar menopausal period, then.
Totally unrelated BTW but I was recently looking at papers around brain size and intelligence among humans vs. nonhuman sapient species like whales, parrots, and elephants, which was a whole other interesting thing about convergent and divergent evolution in social and intelligent animals. Really interesting to learn from differences with our distant cousins to get a better bearing on ourselves.
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