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Time Change (minutes) Reason Clock 1947 7 23:53 0 The initial setting of the Doomsday Clock. 1949 3 23:57 −4 The Soviet Union tests its first atomic bomb, the RDS-1, starting the nuclear arms race. 1953 2 23:58 −1
It is now the closest to midnight since the introduction of the clock in 1947. It is updated by the Bulletin of the Atomic Scientists, which organizes the assessment of how close we are to a self ...
The atomic bomb explosion generated a windstorm several kilometers wide that carried ash, dust, and debris over the mountain ranges surrounding Nagasaki. Approximately 20 minutes after the bombing, a black rain with the consistency of mud or oil came down carrying radioactive material for one to two hours before turning clear. [227]
At 0530, 16 July 1945, in a remote section of the Alamogordo Air Base, New Mexico, the first full scale test was made of the implosion type atomic fission bomb. For the first time in history there was a nuclear explosion. And what an explosion! ... The test was successful beyond the most optimistic expectations of anyone. [150]
The time on the symbolic clock was set at 90 seconds to midnight, the same as in 2023. Prior to that it had stood at 100 seconds to midnight, closer to destruction than at any point since it was ...
But what actually happened was one of the rarest events in the history of the atomic age. A passing U.S. Air Force bomber had accidentally released a (fortunately unloaded) nuclear bomb in transit ...
A nuclear weapon [a] is an explosive device that derives its destructive force from nuclear reactions, either fission (fission or atomic bomb) or a combination of fission and fusion reactions (thermonuclear bomb), producing a nuclear explosion. Both bomb types release large quantities of energy from relatively small amounts of matter.
France tested its first hydrogen bomb in 1968 ("Opération Canopus"). After the Cold War, France has disarmed 175 warheads with the reduction and modernization of its arsenal that has now evolved to a dual system based on submarine-launched ballistic missiles (SLBMs) and medium-range air-to-surface missiles (Rafale fighter-bombers).