And as the Ice Age comes to an end, you know, people differ about this when the Neolithic Age started, but I would guess anywhere from 30,000 years ago to 10,000 years ago, you start having people chilling, you know, where they're going to discover that near these early, you know, these river valleys that they don't have to keep traveling because they have the ability, because of the geography, to grow food. And eventually, animal husbandry, where they can domesticate animals and they don't have to chase buffaloes and such. So the examples on the test most often are Egypt, that you have Egypt developing by the Nile and all of the rich soil there. You have the Tigris and the Euphrates, where you have Mesopotamia, Babylonia, those early early civilizations develop into city-states. You have the Yellow River in China, very early civilizations are developing there, as well as river systems like the Amazon in South America with maybe the Mayans, and that being the central kind of aspect of them developing their civilizations. So river valleys, fertile soil, grow food, Neolithic, put the animals in a cage, yummy, yummy, yummy. I'm a vegetarian, I eat the corn though.