The Mystery of Menopausal Whales

What do middle-aged women and whales have in common? Perhaps the unexpected answer is โ€ฆ menopause. Although they don’t have to suffer through hot flashes and mood swings, several whale species stop getting pregnant midway through life. So-called post-reproductive lifespans have puzzled biologists for years. After all, evolutionary theory taught us that the whole purpose …

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