Dog at vet

Could Fido be our best hope to reverse aging in humans?

A canine elixir for longevity could lead to one for us: They live in our houses, breathe the same air, and suffer many of the same ailments that affect older people.

Veterinarian Vicky Yang and technician Kim Majoy examine the heart of a Cavalier King Charles Spaniel named Ace, who has mitral valve disease, at the Cummings School of Veterinary Medicine in Massachusetts. Ace is participating in a trial of a new gene therapy treatment that could rejuvenate his heart—and maybe someday human hearts as well.
Photograph by Becky Hale
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