On an extraordinary planet, an extraordinary species emerges. Liquid water and fire, known to exist only on Earth, allow mankind to thrive. Threatened by extinction, we use our defining powers to innovate. Farming is invented, animals are domesticated, small towns and cities emerge and networks of trade and communication blossom. The written word enables new advances in technology and engineering, including stunning structures and monuments such as the Pyramids and Stonehenge. Yet disease and warfare also emerge, creating enormous challenges even as the population continues to grow.
Source: History Channel