Newshour 14/03/2015 [audio]
BBC WORLD SERVICE, MARCH 14, 2015

“Pi is a number that shows up in a surprising number of different places throughout math, throughout physics, but more than that, pi is actually the essence of what a circle really is. … I think math is worth celebrating, and anything that catches the public interest and helps give the public a glimmer of how cool math can be is worth celebrating.”