In the future generations to come, women are likely to be slightly shorter and plumper, with healthier hearts and longer reproductive windows, says some "proof" that humans are still evolving.
Evolutionary biologist Steven Stearns and his team at Yale University looked at data from the Framingham Heart Study, which has tracked the medical histories of over 14,000 residents of Framingham, Massachusetts, since 1948.
They found out that women's physical and health seemed to have an effect on the number of children they bore:
Shorter, heavier women tended to have more children, on average, than taller, lighter ones. Women with lower blood pressure and lower cholesterol levels likewise reared more children, and – not surprisingly – so did women who had their first child at a younger age or who entered menopause later. Strikingly, these traits were passed on to their daughters, who in turn also had more children.
Should these trends continue for 10 generations, Stearns calculated that the average woman in 2409 will be 2 centimetres shorter and 1 kilogram heavier, bearing her first child about 5 months earlier and enter menopause 10 months later.
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