Editing 1945 in science (section)

==Physics==
* July 16 – [[Nuclear testing]]: the [[Trinity test]], the first test of an [[nuclear weapon|atomic bomb]], using 6 kilograms of [[plutonium]], succeeds in detonating an explosion equivalent to that of 20 kilotons of TNT.
* August 6 and 9 – [[Atomic bombings of Hiroshima and Nagasaki]] make the world aware of the power of nuclear weapons.
* August 12 – The [[Smyth Report]] is released by the United States government, informing the public of the basics of [[nuclear fission]] and its military and civilian applications, and emphasizing the role played by physics in the development of the atomic bomb.
* August 21 – American physicist [[Harry Daghlian]] accidentally drops a [[tungsten carbide]] brick onto a [[plutonium–gallium alloy]] bomb core, exposing himself to a lethal dose of [[neutron radiation]] and becoming the first known fatality due to a [[criticality accident]] 25 days later.