Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr, where r is ...

When it comes to comparing a pie and a tart, there's no getting around the fact that the pie has the upper hand in America, and we've named the best pie in each state. You might have eaten many a tart ...

Everyone makes mistakes—and sometimes those mistakes can lead to surprising discoveries. In the early 1990s, while programming the computer game Doom, game developer John Carmack set the value of pi ...