But one step that they took in front of the Mesopotamians is they're not going to use clay tablets forever. You can't even imagine how heavy it was to carry a book around back then. So they're going to be able to use some of their natural resources and specifically pyrus, which is going to be a plant material which is going to be made into a paper-like material. So you can record lots of things, you can put it right in your pocket, get on a boat and go down the river and teach something to somebody. And of course there's other inventions as well. Some of them are taken from the Fertile Crescent, other ones are homegrown to Egypt, they're going to have a written numerical system, they're going to be using geometry and algebra and different math systems. They're going to be able to use the Cyrus Star to predict the calendar.