Uncover the surprising connection between Ramanujan's pi formulas and the universe. Learn how his century-old math helps explain turbulence, black holes, and more.

In 1655 the English mathematician John Wallis published a book in which he derived a formula for pi as the product of an infinite series of ratios. Now researchers, in a surprise discovery, have found ...

Pi Day,” which is March 14, 3.14, is a day meant to recognize the special, infinite number that can also be recognized by its symbol π. Pi is an irrational number, which means it goes on ...

March 14—aka Pi Day—isn’t just for math nerds. It’s the one day a year where we celebrate the magic of the number π (pi), which starts at 3.14 and goes on forever. But Pi Day isn’t just about ...

Mathematician Carlos Castillo-Chavez says that pi is so important to math that using its simple, geometric definition denies its greater powers. "[Pi] brings you into the world of mathematics, which ...