Today is class we focused on the topic of Mesopotamia, there known as Sumer occupied the land between the Tigris and Euphrates Rivers. The population increased because of new irrigation techniques. Cities and town were founded, with as many as 40,000 inhabitants. Diversity was allowed since there was better food storage. Sumerias invented writing, also called "cuneiform." The world's first surviving epic was the "Epic of Gilgamesh," it was a flood. The first Sumerian temple was called the, "Ziggurat" and it was located on top of a mountain.