March 14 is Pi Day (3.14, get it?), and to celebrate the magical and mesmerizing mathematical constant, I've collected a dozen very special pi tributes from around the Web (here's a brief history of pi, to boot).

March 14 is Pi Day (3.14, get it?), and to celebrate the magical and mesmerizing mathematical constant, I've collected a dozen very special pi tributes from around the Web (here's a brief history of pi, to boot).