Females tend to live an average of five years longer than males; the average life expectancy for men is 76, while women live to about 81.
And those extra years tend to be healthier, too. The World Health Organization has calculated that American men have 67 years of good health, versus 70 years of "full health" for women. This gender gap in life expectancy seems to occur in all societies, including among apes.
Scientists believe that hormones play a role in lifespan. Research from Duke University found that testosterone plays a role in risky behavior, like driving recklessly, fighting, and excessive drinking and smoking.
It could also be that women's hormones have some benefits; there's evidence that estrogen maintains DNA health, preventing damage that could lead to disease.
Finally, a gender gap women can be happy about!
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