A groundbreaking study reveals evolutionary and genetic roots behind female longevity advantage.
Researchers at the Max Planck Society analysed data from over 1,176 mammal and bird species and found that female mammals live on average 12% longer than males, while in birds, males live about 5% longer. The study debunks the idea that environmental pressures cause this gap, showing it persists even in zoos. Key genetic factors include the heterogametic sex hypothesis—females’ two X chromosomes may protect against harmful mutations. Sexual selection also plays a role, with males in polygamous species dying younger due to competition. The findings highlight how evolution shapes lifespan differences and why the gap is unlikely to disappear soon.
Leave a comment