This is from 2015 FYI. Here's a more in-depth summary: https://www.forbes.com/sites/kevinknudson/2015/11/10/everything-you-ever-wanted-to-know-about-pi-part-2-a

This is from 2015 FYI. Here's a more in-depth summary: https://www.forbes.com/sites/kevinknudson/2015/11/10/everything-you-ever-wanted-to-know-about-pi-part-2-a-new-proof-of-the-wallis-formula-via-physics/#3df5d3021150 https://www.forbes.com/sites/kevinknudson/2015/11/10/everyth...