The Girl Who Doesn't Age

Researchers wonder if 16-year-old toddler might hold genetic key to why we age.

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Brooke's Story

Girl Who Doesn't Grow

Three sisters: Caitlin, 4; Emily, 8; and Brooke, 1. "She looks like a 6-month-old, but she kind of has a personality of a 16-year-old," Caitlin said of Brooke. "Sometimes we joke about how she rebels." (Courtesy Greenberg Family)

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