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Physicist who reshaped our picture of space, time, and light.

Physicist who led Los Alamos and then argued for a grown-up nuclear policy.

Physicist who imagined the nuclear chain reaction — and then tried to govern it.

Physicist who explained nuclear fission and refused to build a bomb.

Physicist who pushed the hydrogen bomb from idea to device.

Mathematician whose theorem ties symmetry to the conservation laws of physics.

Physicist who showed how symmetry governs the quantum world.

Physicist who, with Lise Meitner, named and explained nuclear fission.

Physicist who made quantum electrodynamics usable — and unforgettable.

Physicist whose Frisch–Peierls memorandum showed a uranium bomb was possible.