Most people don’t remember math class, but they do remember Pythagoras. Greek philosopher and mathematician, he is credited with one of the handiest formulae any school student could know: A squared ...

If you remember little else from high school geometry, you probably remember the Pythagorean Theorem: The square of the hypotenuse of a right triangle is equal to the sum of the squares of the other ...

For the Pythagoras cult, this had a tragic aspect. Scholars dispute about the precise beliefs of Pythagoras and his followers, but agree that they included a mystical conviction that numbers ...