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This video is a remastering of one of our older videos on the same topic. We revamped the voiceover, audio quality, added some more animations/edits, and corrected a few factual errors to help the story flow better. You can view the original lower quality video here: [ Ссылка ]

During WWII, development of nuclear weapons was paramount for many of the world's top physicists. Each one of these nuclear weapons required a core of plutonium that measured around 3.5 inches in diameter. 2 cores were used in the nuclear bombing of Japan to stop WWII, but there was a third core ready to be used when needed. When the war ended, the core became the main testing subject for physicists as they continued to improve the United States' nuclear arsenal.

This third core was a 14 pound subcritical mass of plutonium that measured 3.5 inches in diameter. It was also responsible for the direct deaths 2 physicists and many more who died years later from cancer, for which earned the mass its nickname, the "demon core."

The demon core was designed with a small safety margin, only about 5 percent. This was to ensure that it went off in the event of its use. The 14lb radioactive sphere consisted of two plutonium-gallium hemispheres and a center ring designed to keep neutron flux from jetting out of the core during the implosion. This design maximized the destructive power of bomb core...

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