Her Maternity Test Came Back Negative and No One Could Figure Out Why

Foekje’s Story

The first case of chimerism was a woman named Foekje Dillema in 1950. She was a famously successful athlete, known in the running world as the Female Athlete of the Century. It was almost too good to be true…

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The More You Know

  • An oyster's sex is fluid.
  • Oxford University is older than the Aztec Empire.
  • Four times more people speak English as a second language than as a native one.
  • Facebook has more users than many major populations.
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