It’s fairly obvious that women live longer than men on average. Female mammals live on average 12 percent longer than males, with mating strategies playing an important role. XX vs. XYAcross mammal species, from baboons and gorillas up to humans, females usually live longer than the males do. One genetic explanation for this gap called the heterogametic sex hypothesis points to differences in sex chromosomes. So sex chromosomes can only be part of the story.”It’s a male-eat-male world out thereReproductive strategies also played a role, not just genetics.