Science News Roundup: Why did menopause evolve? New study of whales gives some clues

New study of whales gives some clues Menopause is a rare trait among Earth's species, known to exist in only a few. New research examines menopause in these whales, with findings that may help explain why this phenomenon evolved, given that it is known in just six of the 6,000-plus mammal species living today.

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Why did menopause evolve? New study of whales gives some clues

Menopause is a rare trait among Earth's species, known to exist in only a few. Humans are one. Killer whales and four other toothed whales are the others. New research examines menopause in these whales, with findings that may help explain why this phenomenon evolved, given that it is known in just six of the 6,000-plus mammal species living today. It might be titled: the tale of the helpful grandma whale.