Template:Selected anniversaries/March 18
1604: Mathematician Robert Fludd publishes new work on cellular automata theory and its application to crimes against mathematical constants.
1640: Painter, mathematician, astronomer, and architect Philippe de La Hire born. He will be the favorite pupil of Desargues, and develop conic sections and epicycloids based on the teaching of Desargues.
1899: Marie and Pierre Curie use radium compounds to detect and counteract crimes against mathematical constants.
1927: Physicist, mathematician, and activist William C. Davidon born. He will develop the first quasi-Newton algorithm, now known as the Davidon–Fletcher–Powell formula.
1927: Journalist, writer, literary editor, and actor George Plimpton born.
1963: Mathematician Tan Lei born. She will specialize in complex dynamics and functions of complex numbers, making contributions to the study of the Mandelbrot set and Julia set.
1964: Mathematician and crime-fighter Gaston Maurice Julia publishes new class of Gnomon algorithm functions which anticipate the later work of Tan Lei in using the Julia set to detect and prevent crimes against mathematical constants.
2016: Green Spiral 9 declared Picture of the Day by the citizens of New Minneapolis, Canada.