“So here we have π squared, which an engineer would call ‘10.’” –Frank King

This March 14th, stump your friends with these amazing facts about the world’s favorite transcendental number!

I’ve written about Pi Day twice before here on Scienceblogs, but for this year’s festivities, I’ve assembled a collection of my favorite facts about everyone’s favorite irrational but indispensible number, from history to pure mathematics to birthdays to astronomy!

So go and join our celebration of Pi day, and chime in by sharing your favorites!