Although the reason for this remains a mystery, it's a known fact that women tend to live longer than men.

In the United States, women might live to 81.2 years, on average, whereas men have a life expectancy of just 76.4 years.

As well as sex, researchers are unearthing more and more factors that have the potential to prolong our lives.

Social interaction, having a pet, and walking faster have all been recently shown to boost one's longevity.

Could religion have the same effect on our lifespan? New research suggests so. Researchers led by Laura Wallace, a doctoral researcher in psychology at the Ohio State University in Columbus, have conducted two studies whose results show that religion could give believers a 4-year longevity boost.

The findings were published in the journal Social Psychological and Personality Science.

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