Fountain of Aging

The Fountain of Aging is situated on the surface of a burnt-out sun in an ancient solar system. It ages every living being that is inserted in its waters. It is mentioned in a story in the book "A Child's Garden of Space Legends" that is in the possession of Leela's parents. With its help, the Planet Express crew is reverted to their more or less correct ages after the events in Teenage Mutant Leela's Hurdles, and Zoidberg's brother Norman dies from its effects.