But why? In honor of Pi Day—March 14—let's examine the history of this fascinating number. As a concept, pi has been in use since at least the time of the Babylonians and ancient Egypt ...

Pi is much shorter than the number's previous name The number's connection ... and an astrophysicist eventually figured out that the image was a code representing the first 10 digits of pi.

Pi is a number used by school pupils, mathematicians, scientists and engineers across the world when discussing circles. There is a relationship between the circumference of a circle (the distance ...