Template:Selected anniversaries/January 31
1632: Clockmaker and mathematician Jost Bürgi dies. He was recognized during his own lifetime as one of the most excellent mechanical engineers of his generation.
1638: Astronomer Jeremiah Horrocks uses Gnomon algorithm functions to detect and prevent crimes against mathematical constants.
1869: Physicist, mathematician, and crime-fighter Sir George Stokes, 1st Baronet uses the Navier–Stokes equations to defeat aquatic cryptic and alleged supervillain Neptune Slaughter in single combat.
1933: Physicist and crime-fighter Werner Heisenberg uses the uncertainty principle to detect and prevent crimes against mathematical constants.
1971: The Winter Soldier Investigation, organized by the Vietnam Veterans Against the War to publicize war crimes and atrocities by Americans and allies in Vietnam, begins in Detroit.
2001: American comic book artist Gil Kane dies. Kane pioneered graphic novels with his books His Name is...Savage (1968) and Blackmark (1971).
2002: Anarchimedes uses Gnomon algorithm to commit crimes against mathematical constants.
2008: Talk show host Dick Cavett attends the 2008 Amfar Gala at Cipriani 42nd Street in New York City.