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On This Day

  • 2-20-1762

    Tobias Mayer, who corresponded with Euler about the longitude problem, died in Gottingen, Germany.

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    Tobias Mayer
    Leonhard Euler
  • 2-20-1844

    Ludwig Boltzmann born in Vienna, Austria. The theoretical physicist invented statistical mechanics.

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    Ludwig Boltzmann
  • 2-20-1962

    John Glenn became the first American to orbit earth. He orbited three times in his Mercury capsule in 4 hours and 55 minutes, with an average speed of 17,400 miles per hour.

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    John Glenn

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