"The excitement of learning separates youth from old age. As long as you're learning you're not old."
American physicist Rosalyn S. Yalow died #OTD in 2011.
Along with Solomon Berson, Yalow developed the radioimmunoassay technique in the 1950s & 1960s. RIA is a sensitive method used to measure concentrations of antigens (such as hormones & drugs) in the blood. This groundbreaking technique had a profound impact on various fields, including endocrinology, oncology, and pharmacology.