A global study from the Max Planck Institute for Evolutionary Anthropology found that male mammals die younger than females, even in zoos where food, safety, and medical care are guaranteed. Researchers analyzed records from 528 mammal and 648 bird species. In 72% of mammal species, females lived about 12% longer than males. Birds showed the reverse trend, with males in 68% of species living 5% longer. The study, published in Science Advances, linked lifespan gaps to mating systems and body size. Non-monogamous mammals showed a strong female advantage, while monogamous species showed little difference. The pattern held for humans and great apes, suggesting biology—more than environment—drives sex differences in longevity. (Studyfinds)
