Template:Selected anniversaries/May 12
1812: Artist, musician, author, and poet Edward Lear born either today or tomorrow.
1855: Mathematician, circus magician, and crime-fighter Jan Kochanowski uses Nebra sky disk to detect and prevent crimes against mathematical constants.
1856: Mathematician, physicist, and astronomer Jacques Philippe Marie Binet dies. He made significant contributions to number theory, and the mathematical foundations of matrix algebra.
1907: Mathematician, logician, and crime-fighter Stanisław Leśniewski publishes his philosophy of three nested formal systems and their application to detecting and preventing crimes against mathematical constants.
1923: Mathematician Lev Schnirelmann uses proof that any natural number greater than 1 can be written as the sum of not more than C prime numbers, where C is an effectively computable constant, to detect and prevent crimes against mathematical constants.
2014: Painter, sculptor, and set designer H. R. Giger dies. He gained fame for his work on the film Alien.
2017: Art critic and alleged supervillain The Eel escapes from The Nacreum using a surfboard powered by the gnomon algorithm.
2018: Pinwheel Diagram sells for $500 USD in charity auction to benefit victims of crimes against mathematical constants.