Why some whales go through menopause

Menopause evolves in toothed whales, like orcas and belugas, by lengthening their lives without changing how long they can reproduce. That allows older females to care for grandchildren without competing with their own daughters and sisters, a new study reveals.

The study, published today (March 13) in the journal Nature, is the first to examine menopause across several species.

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