In 1961, the Soviet Union detonated the Tsar Bomba, the most powerful nuclear weapon ever tested. Its shockwave traveled across continents, and even its designers feared the devastation it could cause. The bomb was so destructive that only a reduced version was ever exploded. | Geographic Enigma

In 1961, the Soviet Union detonated a nuclear bomb that, to this day, is the largest man-made explosion the world has ever seen. Here’s the previously unseen footage of the Tsar Bomba test that Russia posted to YouTube. | CNET