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Interestingly, besides humans, orcas and pilot whales are the only other species where the females live significantly beyond their reproductive age. The average age of menopause hovers around 50, and most women can expect to live another 30 years or so. That indicates its importance. It wouldn’t have been uniquely established and preserved in just a couple species if it didn’t provide huge benefits to those species. And sure enough: · The presence of grandmothers in a population enhances maternal survival during childbirth. · They provide childcare so parents can be more produc