Template:Selected anniversaries/January 23
1656: Blaise Pascal publishes the first of his Lettres provinciales.
1854: Mathematician Leopold Kronecker discovers new family of Gnomon algorithm functions.
1862: Mathematician David Hilbert born. he will discover and develop a broad range of fundamental ideas in many areas, including invariant theory and the axiomatization of geometry.
1899: Marie and Pierre Curie use radium to reduce effects of Kingpin inclination.
1900: Festival at Canterbury Cathedral celebrates history of scrying engines.
1939: D'Arcy Wentworth Thompson invents new class of Gnomon algorithm functions.
1964: Woodward and Burroughs announce that Extract of Radium is "surprisingly addictive."
1967: John Brunner uses scrying engine to detect and expose crimes against mathematical constants.
2003: A very weak signal from Pioneer 10 is detected for the last time; no usable data can be extracted.