All circles, from onion rings to Saturn’s rings, share a magnificent property: their circumferences stretch about three times longer than their diameters. To be more precise (though still not exact), ...

Happy Pi Day! We celebrate pi on March 14 because 3-14 gives the first three digits of this famous number. But what’s the big deal about pi anyway? Why does it get a day? Well, for starters, it ...

On Pi Day (March 14) we celebrate perhaps the most iconic irrational number on Earth. From its ancient origins to the unanswered questions, here are some of the most surprising facts about pi. When ...