History

The Making of the Atomic Bomb: 8 key ideas

The core ideas of The Making of the Atomic Bomb, each in under a minute, written in our own words. Want the full depth? Get the book.

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  1. IDEA 1 OF 8

    Physics revealed enormous power

    Rhodes tells how physicists in the early twentieth century discovered the structure of the atom.

    Their work revealed that atoms contained vast energy, which could, in theory, be released. Few understood the consequences.

  2. IDEA 2 OF 8

    Szilard imagined a chain reaction

    Rhodes describes how Leo Szilard, crossing a London street in 1933, imagined a nuclear chain reaction.

    He realised this could produce enormous energy, and also a weapon. Few people listened at first.

  3. IDEA 3 OF 8

    Fission was discovered

    In 1938, scientists in Germany discovered nuclear fission, the splitting of uranium atoms.

    Physicists quickly realised its potential for a bomb. Fear spread that Germany would build one first. Time seemed short.

  4. IDEA 4 OF 8

    Einstein warned Roosevelt

    Szilard and others persuaded Albert Einstein to write to President Roosevelt, warning that Germany might build a bomb.

    This led to American research. The letter changed history and set the project in motion.

  5. IDEA 5 OF 8

    The Manhattan Project was huge

    Rhodes describes the Manhattan Project, a vast secret effort involving thousands of scientists and workers.

    It built factories and laboratories across the United States. Its scale was unprecedented. Few knew its purpose.

  6. IDEA 6 OF 8

    Fermi built the first reactor

    In 1942, Enrico Fermi's team created the first controlled nuclear chain reaction in Chicago.

    This proved that a bomb was possible. The reaction was carefully controlled under a stadium in Chicago.

  7. IDEA 7 OF 8

    Oppenheimer led Los Alamos

    Rhodes describes Robert Oppenheimer, who led the laboratory at Los Alamos where the bomb was designed.

    The first test, called Trinity, took place in 1945. Its success amazed and frightened the scientists.

  8. IDEA 8 OF 8

    Bombs fell on Japan

    Rhodes describes the bombing of Hiroshima and Nagasaki, which killed huge numbers of people.

    He reflects on how the bomb changed the world forever. Many scientists later campaigned for arms control.

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