Robert J. Havighurst
Robert James Havighurst (Hurlock) (June 5, 1900 – January 31, 1991) was a chemist and physicist, educator, and expert on human development and aging. Havighurst worked and published well into his 80s. He died of Alzheimer's disease in January 1991 in Richmond, Indiana at the age of 90. Provided by Wikipedia-
1