Hydrology, the study of water, is an ancient and universal science. All cultures need to manage water for their personal use, for their livestock, and for irrigation. Dams, irrigation canals, water conduits, and other hydraulic structures have been found in the ruins of the oldest civilizations. In this chapter, you'll review the biblical and scientific cycle of evaporation and condensation. Then you'll take a look at the ancient world both before and during the global flood that reportedly destroyed all except the passengers sheltered inside a large rectangular box.