Saturday -- March 14, 2015, or 3/14/15 -- marks an extremely nerdy holiday. It is the official celebration of π, the magical, mathematical and infinite constant that is the ratio of a circle’s circumference to its diameter.
Democracy Dies in Darkness
10 stunning images show the beauty hidden in pi
By Ana Swanson
March 14, 2015 at 8:00 a.m. EDT