Scientists reveal the surprising reason why women live longer than men
It's a fact that has been known for more than two centuries – wherever you are around the world, women on average live longer than men.
The primary reason for this intriguing trend has long eluded scientists, but an international team of researchers now claim to put the debate to bed.
They report that it is mainly, but not solely, due to something called the 'heterogametic sex theory'.
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