A teenager who has not aged since she was a toddler may hold the key to immortality.
Brooke Greenberg is 20, but she has remained mentally and physically at the level of a toddler. An American physician is trying to uncover the child's secret, because he wants to give mankind the gift of eternal life.
It is possible that the key to immortality is hidden in this delicate girl, who is only about 76 centimeters (2 feet, 6 inches) tall and weighs seven kilograms (15.4 pounds).
She has no hormonal problems, and her chromosomes seem normal. But her development is proceeding extremely slowly. If scientists can figure out what is causing the disorder, it might be possible to unlock the mysteries of aging itself.
Only the girl's hair and fingernails are growing normally.