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Astonishing Animals That Illuminate Human Health

Giant lizards with superpowered hearts. Hairless rodents that don’t seem to age. Songbirds that babble like human babies. These and other scurrying, soaring, and slithering wonders are teaching scientists how our own bodies work – and how to fix them.

Photo of a Komodo dragon with its tongue out, with bright colored lights on a black background.

Drug Reverses Age-Related Mental Decline Within Days

In the new study, UCSF researchers showed rapid restoration of youthful cognitive abilities in aged mice, accompanied by a rejuvenation of brain and immune cells that could help explain improvements in brain function.