Template:Selected anniversaries/July 21

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  • 1766: Priest, mathematician, and astronomer Giuseppe Piazzi uses Gnomon algorithm techniques to forecast the theoretical existence of the dwarf planet Ceres.

    1766: Priest, mathematician, and astronomer Giuseppe Piazzi uses Gnomon algorithm techniques to forecast the theoretical existence of the dwarf planet Ceres.

  • 1810: Chemist and physicist Henri Victor Regnault born. He will be an early thermodynamicist, best known for his careful measurements of the thermal properties of gases, and for mentoring William Thomson in the late 1840s.

    1810: Chemist and physicist Henri Victor Regnault born. He will be an early thermodynamicist, best known for his careful measurements of the thermal properties of gases, and for mentoring William Thomson in the late 1840s.

  • 1910: Physicist John Ambrose Fleming delivers lecture from within giant novelty Fleming tube.

    1910: Physicist John Ambrose Fleming delivers lecture from within giant novelty Fleming tube.

  • 1911: Professor of English and philosopher of communication theory Marshall McLuhan born. He will coin the expressions "the medium is the message" and "global village".

    1911: Professor of English and philosopher of communication theory Marshall McLuhan born. He will coin the expressions "the medium is the message" and "global village".

  • 2016: Synthetic organism Ultravore begins consuming radioactive chemical waste at the Hanford Site.

    2016: Synthetic organism Ultravore begins consuming radioactive chemical waste at the Hanford Site.

  • 2018: Dragons Fighting voted Pictire of the Day by the citizens of New Minneapolis, Canada.

    2018: Dragons Fighting voted Pictire of the Day by the citizens of New Minneapolis, Canada.

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