Heavy Water Reactors

As scientists decided which materials they would use to build the early nuclear reactors, some staked their country’s nuclear programs on small amounts of a substance practically indistinguishable from water.

Los Alamos Innovations: Electronics and Detonators

Manhattan Project scientists and engineers in Los Alamos, NM designed and developed a number of innovations in the field of electronics.

Los Alamos Innovations: High-Speed Photography

Innovations in high-speed photography at Los Alamos helped develop photography into its modern-day form.

Discovery of Mendelevium

Mendelevium, or element 101, was discovered at the Berkeley Rad Lab in 1955 using advanced techniques and tools.


By 1938, the confused chemistry of uranium became the "topic of the day" at laboratories everywhere.