Denham Harman

Denham Harman (February 14, 1916 – November 25, 2014) was an American biogerontologist. He was the professor emeritus at the University of Nebraska Medical Center. Harman was widely known as the "father of the free radical theory of aging".
Harman died in Omaha, Nebraska on November 25, 2014 from a short-illness, aged 98.