Females of some whale species have evolved to live drastically longer lives so they can care for their families, new research shows.
The study focussed on five whale species that -- along with humans -- are the only mammals known to go through menopause.
"The most obvious way for a female to do this is to breed for the entire lifespan -- and this is what happens in almost all animal species. There are more than 5,000 mammal species, and only six are known to go through menopause. "The evolution of menopause and a long post-reproductive life could only happen in very specific circumstances," said Professor Darren Croft, of the University of Exeter and Executive Director at the Center for Whale Research
"This study is the first to cross several species, enabled by the recent discovery of menopause in multiple species of toothed whales.
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