Here's a couple videos I found interesting here on Pi Day, crazy to think of all the mathematic formulas quietly at work in our day to day lives.
First off Eugenia Chang offers a brief and concise rundown of Pi and it's importance in the world.
Also for those looking for a more deep dive into Pi and its historical place in the world Simon Clark offers a more detailed video.
And just in case you were looking for thirds here on Pi Day, earlier today Google Employee Emma Haruka Iwao calculated the value of Pi to 31,415,926,535,897 digits... thats more than 9 trillion more digits than the previous record. Enjoy Pi Day see you around (that's a Pi joke).