Edith Renfrow Smith, a 111-year-old SuperAger in a Northwestern University study on aging, has died.

Edith Renfrow Smith, a participant in Northwestern University's 'SuperAgers' study known for her exceptional memory and cognitive health at an advanced age, has died at 111. She was one of the oldest individuals in the study, which examines why some people maintain sharp mental function into old age. Her passing marks the loss of a key figure in research on aging and longevity.