Pi is something we learn about in early geometry class. It’s a way to figure out the area of a circle. It turns out that calculating Pi used to be incredibly difficult. Before Isaac Newton, we would have to determine the number in some pretty strange ways.
Stop robocalls once and for all
Robocalls are not only annoying, but they scam Americans out of millions every year. Learn Kim's tricks for stopping them for good in this handy guide.