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Births
1867 – Charles Dillon Perrine, American-born astronomer
1902 – Karl Popper, Austrian-born philosopher
1904 – Pavel Alekseyevich Cherenkov, Russian physicist, Nobel laureate
1915 – Charles Townes, American physicist, Nobel laureate
1925 – Baruch S. Blumberg, American scientist, Nobel laureate
Deaths
1869 – Jan Evangelista Purkyně, Czech anatomist
1930 – Allvar Gullstrand, Swedish ophthalmologist, Nobel laureate
1968 – Otto Hahn, German chemist, Nobel laureate
2000 – Abraham Pais, Dutch-born American physicist, science historian, and biographer of Albert Einstein.
2002 – Archer John Porter Martin, English chemist, Nobel laureate
2004 – Francis Crick, English molecular biologist, Nobel laureate