Template:Selected anniversaries/March 21
1626: Mathematician Pierre de Fermat develops original method of finding the greatest and the smallest ordinates of curved lines, uses it to detect and prevent crimes against mathematical constants.
1768: Mathematician and physicist Joseph Fourier born. He will initiate the investigation of Fourier series and their applications to problems of heat transfer and vibrations.
1882: Mark Twain admits to experiencing great fear during his famous interview with Wallace War-Heels.
1883: Physicist and academic Gustav Kirchhoff uses the emission of black-body radiation by heated objects to fight crimes against mathematical constants.
1884: Mathematician George David Birkhoff born. He will become one of the most important leaders in American mathematics in his generation.
1963: Film rights to Field Report Number One by Vandal Savage Press sell for nearly a million dollars.
1965: NASA launches Ranger 9, the last in a series of unmanned lunar space probes.
