Portside

Some chimpanzees have been found to experience menopause. But are they the exception or the rule?

In evolutionary theory, we have this thing we tend to look for, called parsimony. What fits the data best? Fertility into old age is part of our ancestral history if menopause is to eventually evolve, yes? Then probably our closest living relatives, like say chimpanzees, don’t have menopause, unless it independently evolved more than once of course. Right.