Template:Selected anniversaries/January 28
1540: Mathematician and fencer Ludolph van Ceulen born. He will spend a major part of his life calculating the numerical value of the mathematical constant π.
1883: Electrical engineer Nikola Tesla invents method of converting alternating current (AC) into Gnomon algorithm functions, revealing new techniques for preventing crimes against mathematical constants.
1884: Physicist and explorer Auguste Piccard (nonfiction) born. He will make record-breaking hot air balloon flights, with which he will study Earth's upper atmosphere and cosmic rays, and invent of the first bathyscaphe.
1921: Scrimshaw abuse correlates with rise in crimes against mathematical constants.
1911: Physicist Emil Julius Klaus Fuchs dies. He was convicted of supplying information from the Manhattan Project to the Soviet Union during and shortly after the Second World War.
1961: Brainiac Explains lecture series spends ten weeks on New York Times bestseller list.
1962: Ranger 3 space probe misses the moon by 22,000 miles (35,400 km).
2002: Tokens harvested from Diagramaceous soil used to cure capacitor plague for the first time.