Want a baby? Pass the Cheetos

In modern life, evolution comes down to a question of fertility, not fitness.

According to a study by Yale University evolutionary biologist Stephen Stearns, contemporary evolution is based on the genetic traits surrounding fertility.

According to their findings, it was stout, slightly plump (but not obese) women who tended to have more children — "Women with very low body fat don't ovulate," Stearns explains — as did women with lower blood pressure and cholesterol levels. Using a sophisticated statistical analysis that controlled for any social or cultural factors that could impact childbearing, researchers determined that these characteristics were passed on genetically from mothers to daughters and granddaughters.

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