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The idea for the atomic bomb was patented by Hungarian physicist Leó Szilárd in 1934.
Enrico Fermi, member of the scientific team working on the Manhattan Project, achieved the world's first sustained and controlled nuclear chain reaction at the University of Chicago on December 2, 1942, which led to the creation of the first atomic bomb.

en.wikipedia.org/wiki/History_of_nuclear_weapons

Nuclear weapons possess enormous destructive power from nuclear fission or combined fission and fusion reactions. Starting with scientific breakthroughs ...

asiasociety.org/education/brief-history-nuclear-weapons-states

The world's first nuclear weapons explosion on July 16, 1945, in New Mexico, when the United States tested its first nuclear bomb. Not three weeks later, the ...

www.icanw.org/the-facts/the-nuclear-age

UN calls for elimination of atomic weapons ... France explodes its first atomic bomb in the Sahara desert. ... It is the largest anti-war demonstration in history.

www.history.com/news/category/nuclear-weapons

Some 260,000 people survived the atomic bomb attacks on Hiroshima and Nagasaki during World War II, but Japanese engineer Tsutomu Yamaguchi was one ...

www.history.com/topics/world-war-ii/bombing-of-hiroshima-and-nagasaki

On August 6, 1945, during World War II (1939-45), an American B-29 bomber dropped the world's first deployed atomic bomb over the Japanese city of ...

www.atomcentral.com/atom-bomb-history.aspx

History leading to the creation of the atomic bomb. Atomic science began many centuries ago with experimenting and probing into the nature and structure of ...

www.nobelprize.org/educational/peace/nuclear_weapons/readmore.html

Finally, on July 16, 1945, the first atomic bomb was tested in the midst of the ..... Two instructive historical accounts of the first fifty years of the nuclear age are: ...

www.ushistory.org/us/51f.asp

This once classified photograph features the first atomic bomb — a weapon that atomic scientists had nicknamed "Gadget." The nuclear age began on July 16, ...

www.ask.com/youtube?q=History+of+the+Nuclear+Bomb&v=dGFkw0hzW1c
Oct 27, 2015 ... On July 16th, 1945, the United States conducted the world's first test of a nuclear weapon. Less than a month later, two bombs were dropped on ...