Basic Yellow 1, a dye used in neuroscience labs around the world to detect damaged protein in Alzheimer’s disease, is a wonder drug for nematode worms. Thioflavin T extended lifespan in healthy worms by more than 50 percent and slowed the disease process in worms bred to mimic aspects of Alzheimer’s. The research — involving protein homeostasis — could open new ways to intervene in aging and age-related disease.