When I was studying engineering, I wired a circuit board incorrectly, and a small mushroom cloud of smoke rose from one of the components.

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The mushroom cloud alone was stretched out 41 miles high and was over 59 miles wide, essentially one big cloud from Hyannis to Boston, Massachusetts, or surely enough to cover Manhattan two times over.

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He signed the letter to Franklin Roosevelt warning that it may be possible to build an atom bomb, and the letters of his famed equation relating energy to mass hover in our minds when we picture the resulting mushroom cloud.

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