I LOVE PI. No, not pie. Pi. The number. This crazy number shows up in all sorts of weird places.  If you take the square root of the gravitational field (g = 9.8 N/kg) you approximately get pi. Place a mass on a spring and let it oscillate? Yup, you get pi. Pi also one of the 5 super numbersin this magical equation:

https://www.wired.com/2017/03/lets-calculate-pi-raspberry-pi-celebrate-pi-day/?mbid=social_fb