History Photographed on Instagram: "This archival film shows the 1961 test of the Tsar Bomba, the most powerful bomb ever detonated.⁠ ⁠ Its 50-58 megaton blast was over 1,570 times stronger than the Hiroshima and Nagasaki bombs combined. ⁠ ⁠ Detonated on October 30, 1961, the blast wave circled the globe three times; the flash was visible from 1,000 km, and its cloud reached over 67 km in height."