vaporland writes "Tsar Bomba is the Western name for the RDS-220, the largest, most powerful weapon ever detonated. The bomb was tested on October 30, 1961, in an archipelago in the Arctic Sea. Developed by the Soviet Union, the bomb had a yield of about 50 megatons. Its detonation released energy equivalent to approximately 1% of the power output of the Sun for 39 nanoseconds of its detonation. The device was scaled down from its original design of 100 megatons to reduce the resulting nuclear fallout. The Tsar Bomba qualifies as the single most powerful device ever utilized throughout the history of humanity."