One answer, predating Pythagoras by over 1,000 years, is in land surveying. Lurking in a museum in Istanbul is a 3,700-year-old clay tablet known as Si.427.

Pythagoras is credited for creating the famous Pythagorean theorem, but ancient clay tablets suggest the math concept was formed more than 1,000 years before the ancient Greek's birth.

This is the monochord, invented by the mystical mathematician Pythagoras to demonstrate the connection between musical harmony and the structure of the world. It was simplicity itself: ...

The monochord was originally a scientific instrument — the sonometer — invented by the mathematician Pythagoras and only featured one string. The monochord that Cynthia strums in her video ...