December 25

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  • 1642: Isaac Newton born. He will be widely recognized as one of the most influential scientists of all time and a key figure in the scientific revolution.

    1642: Isaac Newton born. He will be widely recognized as one of the most influential scientists of all time and a key figure in the scientific revolution.

  • 1730: Physician and activist Filippo Mazzei born. Mazzei will act as an agent to purchase arms for Virginia during the American Revolutionary War.

    1730: Physician and activist Filippo Mazzei born. Mazzei will act as an agent to purchase arms for Virginia during the American Revolutionary War.

  • 1763: Inventor Claude Chappe born. Chappe will invent and develop a practical semaphore system that will span all of France -- the first practical telecommunications system of the industrial age.

    1763: Inventor Claude Chappe born. Chappe will invent and develop a practical semaphore system that will span all of France -- the first practical telecommunications system of the industrial age.

  • 2016: Astronomer and academic Vera Rubin dies. She discovered the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves.

    2016: Astronomer and academic Vera Rubin dies. She discovered the discrepancy between the predicted angular motion of galaxies and the observed motion, by studying galactic rotation curves.

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