1974
Earl W. Sutherland Jr. dies on March 9, 1974. The Nobel Prize-winning biochemist discovered cyclic AMP, a key messenger molecule in hormone signaling and one of the great breakthroughs of modern biochemistry.
1981
Max Delbrück dies on March 9, 1981. His bacteriophage experiments helped establish molecular genetics and shaped the understanding of heredity at the molecular level.
1983
Ulf von Euler dies on March 9, 1983. The Swedish physiologist discovered noradrenaline as a neurotransmitter and made major contributions to neurophysiology and chemical signaling.