Template:Selected anniversaries/April 24
1656: Mathematician and physicist Thomas Fincke dies. He introduced the modern names of the trigonometric functions tangent and secant.
1746: Priest and physicist Jean-Antoine Nollet discharges a battery of Leyden jars through a human chain, exposing a math criminal was posing as a priest.
1870: Mystic and faith healer Grigori Rasputin uses time travel device to commit crimes against mathematical constants.
1870:The Custodian cleans up paradoxes caused by Grigori Rasputin's experiments in time travel device.
1914: The Franck–Hertz experiment, a pillar of quantum mechanics, is presented to the German Physical Society.
1915: Miniaturized version of John Ambrose Fleming delivers lecture from within Fleming tube.
1967: Cosmonaut Vladimir Komarov dies in Soyuz 1 when its parachute fails to open. He is the first human to die during a space mission.