Henry Hallett Dale

Henry Hallett Dale was born on 9 June 1875 in England and trained as a pharmacologist and physiologist. His work centered on acetylcholine, the molecule that carries signals between nerve cells — a finding that upended the assumption that the nervous system ran on pure electrical current. The research earned him the 1936 Nobel Prize in Physiology or Medicine, shared with Otto Loewi, who had independently demonstrated chemical neurotransmission. Dale's insight laid the groundwork for modern neuroscience and drug development. He died on 23 July 1968.