The document provides a sneak preview of several ancient civilizations including Mesopotamia, Egypt, India, China, Greece and Rome by listing some of their key features such as the oldest known civilization of Mesopotamia included Babylon and Gilgamesh, Egypt was known for the Nile River and mummies, India developed the Indus Valley and Hindu religion, China built the Great Wall and had many dynasties, Greece believed in Greek gods and myths and held the first Olympics, and Rome established the Roman Empire and built structures like the Coliseum.