Births
1823 - Alfred Russel Wallace, British naturalist and biologist
1891 - Walther Bothe, German physicist and Nobel Prize laureate
1902 - Carl Rogers, American psychologist
1903 - Igor Kurchatov, Russian physicist
1942 - Stephen Hawking, English theoretical physicist
Deaths
1642 - Galileo Galilei, Italian astronomer and scientist
1980 - John Mauchly, American physicist
1997 - Melvin Calvin, American chemist and Nobel Prize laureate
2002 - Alexander Prochorow, Russian physicist and Nobel Prize laureate