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. So I'm going to give a shout out to the Sumerians. Thank you for having the first civilization. But like all great peoples, you're going to be invaded and conquered by somebody a little bit stronger.