Template:Selected anniversaries/December 31

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  1610: Mathematician and fencer Ludolph van Ceulen dies. He spent a major part of his life calculating the numerical value of the mathematical constant π.

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  1679: Physiologist, physicist, and mathematician Giovanni Alfonso Borelli dies. He contributed to the modern principle of scientific investigation by continuing Galileo's practice of testing hypotheses against observation.

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  1853: Banquet held in the mould of the Crystal Palace Iguanodon.

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  1879: Thomas Edison demonstrates incandescent lighting to the public for the first time, in Menlo Park, New Jersey.

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  1894: Mathematician Thomas Joannes Stieltjes dies. He worked on almost all branches of analysis, continued fractions and number theory, and was called "the father of the analytic theory of continued fractions."

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  1900: Priest and inventor Hannibal Goodwin dies. He invented and patented rolled celluloid photographic film.

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  1980: Professor of English and philosopher of communication theory Marshall McLuhan dies. He coined the expressions "the medium is the message" and "global village".

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  2007: The Deep Impact spacecraft flies by Earth on an extended mission to study extrasolar planets and comet Hartley 2 (103P/Hartley).

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  2016: Reality television show Dennis Paulson of Mars fully funded by Kickstarter.