https://www.pbslearningmedia.org/resource/62d09955-3795-45db-8663-3a5f9b27782c/water-and-classical-civilizations-crash-course-world-history-222/
Join host John Green to learn about water. People cannot live without water, which means it's absolutely necessary for civilization. In this episode, John...
classical civilizationscrash courseworld historywaterpbs