Write down that ten times. They're the first ones to investigate astronomy and medicine and chemistry. And because of the ziggurats, architecture becomes really important. You need ramps and you need arches and you need columns, which means you need—brace yourself, kids—you need math. So they come up with a mathematical system that was based on 60. That's why we have 60 seconds. That's why there's 360 degrees in a circle.