Since the first nuclear test on 15 July 1945, there have been over 2,051 other nuclear weapons tests around the world. The device tested in 1945 had a 20 kiloton yield, meaning it had the explosive force of 20,000 tons of TNT.
Within 20 years, the US and USSR tested nuclear weapons larger than 10 megatons, or 10 million tons of TNT. For scale, these weapons were at least 500 times as strong as the first atomic bomb.
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