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8,000 Years Ago, 17 Women Reproduced for Every One Man

Once upon a time, 4,000 to 8,000 years after humanity invented agriculture, something very strange happened to human reproduction. Across the globe, for every 17 women who were reproducing, passing on genes that are still around today—only one man did the same. “It wasn’t like there was a mass death of males. They were there, so what were they doing?” …

DNA

Wealth and power may have played a stronger role than ‘survival of the fittest’

Tempe, Ariz. — The DNA you inherit from your parents contributes to the physical make-up of your body — whether you have blue eyes or brown, black hair or red, or are male or female. Your DNA can also influence whether you might develop certain diseases or disorders such as Crohn’s Disease, cystic fibrosis, hemophilia or neurofibromatosis, to name a …