Another “scientific finding” that is nothing but fancy guessing. By the same reasoning of this article, there is absolutely no reason that women live twice as long as their reproductive capability. Yet, such inconvenient facts don’t slow down such wild conjecture even for a second.
I might as well go find a rock at random along the road and create a 300 page thesis about how it got exactly where it is. After all, I have the strong supporting evidence that it is, in fact, exactly where my hypothesis says it must be.
Really? Are you forgetting the evolutionary advantage that older women could provide, in primitive societies, to their children and grandchildren? From caring for the young, retaining and passing on knowledge, to food preparation while the adults are out hunting and gathering -- the list of beneficial contributions is quite long.
And with evolution, all of this counts! If you help your grandchildren survive to reproduce, your genes are passed on to still another generation.

Do not touch ancient holy rock! It was put there at the beginning of time by my ancestors as a totem to Sly Fox, the Trickster who follows squirrel as summer follows spring. It is sacred to we native Fugawi!