Schrödinger's Cat
A cat sealed in a box, neither alive nor dead until somebody looks. The story was invented to show the idea was absurd.
193514 min read
American theoretical physics
Hugh Everett III
1930 – 1982
Princeton graduate student whose 1957 dissertation proposed that the wave function never collapses and that measurement simply entangles observer with system — the "relative state" formulation later popularised by Bryce DeWitt as the many-worlds interpretation. Discouraged by the reception, including a cool meeting with Bohr in Copenhagen, he left academia for defence operations research and never returned.