Jerome Cardano’s astrological reckoning was the date I used to backtrack Marc Jones Martin Luther King scope, and I have been a fan ever since. Since we seem to hitting a lot of mathematicians this week, I thought I would add his for Cardano wrote Ars magna (The Great Art; or, The Rules of Algebra) a cornerstone in the history of algebra cementing his reputation as a great mathematician and then turned his hand to astrology (astronomy in his day). His biograph is here. Pluto not discovered for another 400 years, tells the tale for Signore Cardano, who prophesized his own…
