Add Yahoo as a preferred source to see more of our stories on Google. As if math wasn't confusing enough, we have Pi to contend with. An irrational number that has no end. It sounds like an easy ...

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. Time is a flat circle, Matthew McConaughey tells us, neglecting to ...

As if math wasn't confusing enough, we have Pi to contend with. An irrational number that has no end. It sounds like an easy enough calculation in that it's the ratio of a circle's circumference to ...

I have a nearly pi-like (i.e., endless) supply of Pi Day memes. I'll control myself and only post one.