Template:Selected anniversaries/April 2
1565: Explorer Cornelis de Houtman born. De Houtman will discover a new sea route from Europe to Indonesia, beginning the Dutch spice trade.
1618: Mathematician and physicist Francesco Maria Grimaldi born. Grimaldi, along with Riccioli, will investigate the free fall of objects, confirming that the distance of fall was proportional to the square of the time taken.
1872: Painter and inventor Samuel Morse dies. Morse co-invented the Morse code.
1898: Mathematician Chiungtze C. Tsen born. Tsen will prove Tsen's theorem, which states that a function field K of an algebraic curve over an algebraically closed field is quasi-algebraically closed (i.e., C1).
1902: Graphic designer and typographer Jan Tschichold born. Tschichold will become a leading advocate of Modernist design, but later condemn Modernist design in general as being authoritarian and inherently fascistic.
1923: Polymath George Spencer-Brown born. Spencer-Brown will write Laws of Form, calling it the "primary algebra" and the "calculus of indications".
1976: Mathematician, checkers player, and Gnomon algorithm theorist Marion Tinsley visits the Nested Radical coffeehouse in New Minneapolis, Canada, where he plays checkers against several well-known criminal mathematical functions, including Gnotilus and Killer Poke. Tinsley easily defeats all of his opponents, calling them "lightweights and wanna-bees".
2004: Computer scientist, engineer, and academic John Argyris dies. Argyris pioneered the use of computer applications in science and engineering, was among the creators of the finite element method.
2016: Pink City voted Picture of the Day by the citizens of New Minneapolis, Canada.