tumanvälineen
Tumanvälineen is a Finnish term that translates loosely to "nuclear weapon" or "atomic bomb." It refers to a device that derives its explosive energy from nuclear reactions. There are two primary types of nuclear weapons: fission weapons and fusion weapons. Fission weapons, often called atomic bombs, use the splitting of heavy atomic nuclei, such as uranium or plutonium, to release energy. Fusion weapons, also known as hydrogen bombs or thermonuclear weapons, utilize a fission reaction to trigger a secondary fusion reaction, which releases a much greater amount of energy by combining light atomic nuclei, typically isotopes of hydrogen.
The development of nuclear weapons began during World War II with the Manhattan Project, a secret research