VersoFri., March 14, 2014 | Kate LainTomorrow we open "Lost and Found: The Secrets of Archimedes," an exhibition focusing on the Archimedes Palimpsest (explained, along with more information about the exhibition, here) and organized by the Walters Art Museum. Among the interests of Archimedes, who lived in the third century B.C.E., was the calculation of π (pi), that mathematical constant that is the ratio of the circumference of a circle to its diameter.