Rosalyn S. Yalow — American Scientist born on July 19, 1921,

Rosalyn Sussman Yalow was an American medical physicist, and a co-winner of the 1977 Nobel Prize in Physiology or Medicine for development of the radioimmunoassay technique. She was the second American woman to be awarded the Nobel Prize Physiology or Medicine after Gerty Cori... (wikipedia)

The excitement of learning separates youth from old age. As long as you're learning you're not old.
The failure of women to have reached positions of leadership has been due in large part to social and professional discrimination.