November 27

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  1701: Astronomer, physicist, and mathematician Anders Celsius born. In 1742 he will propose the Celsius temperature scale which today bears his name.

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  1754: Mathematician and theorist Abraham de Moivre dies. His book on probability theory, The Doctrine of Chances, was prized by gamblers of his day.

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  1810: The Berners Street hoax brings traffic to a standstill in parts of London.

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  1852: Mathematician and writer Ada Lovelace dies. She did pioneering work in symbolic languages for machine processes, developing what will later be called computer programs for Charles Babbage's early mechanical general-purpose computer, the Analytical Engine.

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  1971: The The Mars 2 landing module crashes on Mars after its parachute fails to deploy.

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  2017: Dennis Paulson of Mars observes a moment of silence in memory of the forty-sixth anniversary of the Mars 2 crash.