Time is a flat circle, Matthew McConaughey tells us, neglecting to explain how then we could measure time's circumference to derive its diameter, using pi. (Maybe it's best not to take the sentiment ...

U.S. President Barack Obama shareD his strawberry pie with a boy during a lunch stop at the Kozy Corners restaurant in Oak Harbor, Ohio. Here are some jokes for Pi Day. Reuters This story was updated ...

On March 14, math classes across the country will celebrate Pi Day—a national holiday in honor of the mathematical constant pi, which represents the ratio of a circle’s circumference to its diameter ...