Celestial nexus on Instagram: "In 1945, as the world was still reeling from the bombings of Hiroshima and Nagasaki, scientists at Los Alamos were preparing a third plutonium core for another weapon. But the war ended before it could be used. This leftover sphere of plutonium—only 6.2 kg—was stored for experiments. It was meant to be just another piece of metal. Instead, it became infamous as “The Demon Core.” Why? Because even without being inside a bomb, the core was already on the edge of crit

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