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Menopausal whales lead the group, study says
Menopausal whales lead the group, study says

What does an ocean-going titaness do after she has the lost the ability to bear young? Well, for starters, she goes on living--sometimes past the ripe old age of 90, while male killer whales over 50 are dying off in droves. Throughout the animal kingdom, that is unusual enough. But the menopausal female killer whale does more than survive, says a new study: She "leans in," becoming an influential leader of younger killer whales, honing the survival skills of her progeny, unencumbered by direct childcare duties of her own. Quite the opposite of being a burden to her kind, her post-menopausal leadership role seems to make the older female killer whale her species'...

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