On October 30, 1961, the Soviet Union detonated the Tsar Bomba over Novaya Zemlya. At 50 megatons, it was the most powerful human-made explosion in history—so massive it shattered windows over 500 ...

Astronomers have discovered the biggest explosion seen in the Universe in a galaxy cluster 390 million light years away. At the center of the Ophiuchus galaxy cluster, there is a supermassive black ...