January 22:

• 1561 - Birth of Sir Francis Bacon, English philosopher (d. 1626)

• 1592 - Birth of Pierre Gassendi, French philosopher, mathematician, and scientist (d. 1655)

• 1767 - Death of Johann Gottlob Lehmann, German minterologist and geologist (b. 1719)

• 1796 - Birth of Karl Claus, Russian chemist (d. 1864)

• 1903 - Birth of Fritz Houtermans, Polish physicist (d. 1966)

• 1908 - Birth of Lev Landau, Soviet physicist, Nobel laureate (d. 1968)

• 1922 - Death of Camille Jordan, French mathematician (b. 1838)

• 1936 - Birth of Alan J. Heeger, American chemist, Nobel laureate