This Day In History : January 23

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Also on This Day in History January 23

Discover what happened on January 23 with HISTORY's summaries of major events, anniversaries,
famous births and notable deaths.

Births on This Day, January 23
  • 1907 Hideki Yukawa

    Japanese physician and physicist who shared the 1949 Nobel Prize for Physics for “his prediction of the existence of mesons on the basis of theoretical work on nuclear forces.”

  • 1785 Carl Adolph Agardh

    Swedish botanist and mathematician whose Synopsis alagarum Scandinaviae of 1817 presented a new systematic survey of all algae.

  • 1693 Georg Bernhard Bilfinger

    German philosopher, mathematician, statesman, and author of treatises in astronomy, physics, botany, and theology.

  • 1719 John Landen

    British mathematician who made important contributions on elliptic integrals.

  • 1857 Andrija Mohorovicic

    Croatian meteorologist and geophysicist who discovered the boundary between the Earth's crust and mantle, a boundary now named the Mohorovicic discontinuity.

Deaths on This Day, January 23
  • 1864 Johann Lukas Schönlein

    German physician whose attempts to establish medicine as a natural science helped create modern methods for the teaching and practice of clinical medicine.

  • 1921 Wilhelm von Waldeyer

    He was a German anatomist who coined the terms neuron (1891) and chromosome (1888), and a number of embryological terms (including those to describe the structure of developing teeth).

  • 1805 Claude Chappe

    French engineer who invented the semaphore visual telegraph.

  • 1766 William Caslon

    English typefounder who created (1720-26) the Caslon typeface.

  • 1622 William Baffin

    English explorer who sought the Northwest Passage as a route around the northern coast of North america.

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