African infants have had a greater chance of survival if they have a living maternal grandmother who is without young children of her own. This fact has been used to support an evolutionary explanation of

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This fact supports the evolutionary explanation of menopause, as it suggests that older women who can no longer bear children themselves can continue to pass on their genes by caring for their grandchildren, thereby increasing the chances of survival for their offspring's offspring.

African Infants Have Had a Greater Chance of Survival If