Unsolved Scientific Mysteries That Have Experts Baffled

The Girl Who Never Aged

At the time of her death at age 20, Brooke Greenberg (pictured with her two sisters) still looked like a toddler. Except for her hair and nails, her entire body stopped developing while she was still a young child, and scientists aren’t exactly sure why – especially when studies of her genes came back normal, and no one in her family had any sort of genetic abnormalities. Scientists continue to refer to her rare disorder as “Syndrome X.”

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