Imagine the power of the bomb dropped on Hiroshima in 1945 and then multiply it by 670,000 times. Terrifying doesn't really ...

After the Soviet Union detonated a 50-megaton bomb over an uninhabited island north ... Soviet Premiere Nikita Khrushchev originally wanted to test a 100-megaton weapon. Plans were scaled back ...

The Tsar Bomba wasn’t just a bomb—it was a message. In 1961, the Soviet Union detonated the largest nuclear weapon ever built, unleashing a 50-megaton explosion that was 3,000 times more powerful than ...

In 1962, the US government launched a 1.4 megaton bomb from Johnston Island. And detonated it 400 km above the Pacific — about as high as where the International Space Station orbits today.