Menopause in some whale species may explain their longer lifespans, according to a new study.

Menopause in female whales may explain why some species live decades longer than others, according to a new study. Menopause is known to exist in just five species of toothed whales: short-finned pilot whales, false killer whales, killer whales, narwhals, and beluga whales. Researchers suggest that the evolution of menopause in these whale species enables older females to provide care for younger generations, leading to longer lifespans without increased competition for mates.