Ministry of medium machine building of USSR / Russian state atomic energy corporation Rosatom / Handout via Reuters
A mushroom cloud rises after the so-called Tsar Bomba detonated in a test over the remote Novaya Zemlya archipelago in USSR, in this still image from previously classified footage taken in October 1961.
The USSR conducted a test of the ‘Tsar Bomba’ over the Dry Nose nuclear test site on the remote Novaya Zemlya archipelago at an altitude of about four kilometers (2.5 miles) The yield of the thermonuclear explosion was more than 50 megaton, while the mushroom cloud rose to a height of 67 kilometers.
