A woman with a rare genetic mutation that has protected her from dementia
This make me curious about mutations and human evolution.<p>By 50 years of age she has past her (natural) maternal age. So it's not like women with that mutation would bear more children.<p>How would such a mutation help her lineage? But that same question, more broadly, how do mutations that benefit people past their child bearing age factor into human evolution?<p>I suppose mentally healthy grandparents are able to spend more time with grandchildren freeing up the parents to be more productive. They can also pass down wisdom, techniques that could benefit grandchild.