July 21

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  • 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.

  • 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".

  • 1966: Human spaceflight: Gemini 10 recovered after a 70-hour mission that included docking with an orbiting Agena target vehicle.

    1966: Human spaceflight: Gemini 10 recovered after a 70-hour mission that included docking with an orbiting Agena target vehicle.

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