Take an in-depth look at how the atomic bomb "Little Boy" worked, the first nuclear weapon ever used in warfare. Dropped on Hiroshima, Japan, on August 6, 1945, the bomb marked the beginning of the ...

The dropping of the atomic bomb on Hiroshima, Japan, effectively ended WWII, but took thousands of civilian lives. On August 6, 1945, the bomb was dropped on the city.

Find out just how close the Nazis came to building atomic weapons during World War II, and view the only known diagram of a German nuclear bomb.

The United States dropped the world's first atomic bomb on Hiroshima on Aug. 6, 1945, destroying the city and killing 140,000 people. The United States dropped a second bomb three days later on ...

The Manhattan Project ushered in not only the nuclear age but the Anthropocene, the epoch in geological time that denotes humans' transformation of the Earth's chemistry, climate and biodiversity.

If you want to learn more about the Manhattan Project, the atomic bomb, the Trinity Site, and J. Robert Oppenheimer himself, here's where to start.