Why Do Women Live Longer Than Men?

Women outlive men, by something of a long shot: In the United States, women have a life expectancy of about 80, compared to around 75 for men.

This holds true regardless of where women live, how much money they make and many other factors. It’s even true for most other mammals.

“It’s a very robust phenomenon all over the world, totally conserved in sickness, during famines, during epidemics, even during times of starvation,” said Dr. Dena Dubal, a professor of neurology at the University of California, San Francisco.