This section provides an overview of the history of the Manhattan Project, the key organizations involved, the science behind the bomb, and more.
Although the Manhattan Project was overall a surprisingly safe project, there were a few tragic accidents.
Some of the terms encountered when perusing the website can be confusing or obscure. This glossary is provided to assist readers and learners of Manhattan Project history.
President Franklin D. Roosevelt authorized the research, development, and production of an atomic bomb despite great uncertainties.
The Frisch-Peierls Memorandum was an important assessment confirming the feasibility of an atomic bomb.
The most difficult part of the Manhattan Project was not the scientific theory of the bomb but the engineering.
On December 2, 1942, Chicago Pile-1 went critical, creating the world’s first controlled, self-sustaining nuclear chain reaction.
Before the Manhattan Project, about two thousand people lived in White Bluffs, Hanford, and Richland, WA or nearby. For centuries, four different Native American tribes enjoyed the land along Columbia River.