Synopsis

Water blankets nearly seventy percent of our planet, a vast expanse largely unchanged since Earth's earliest days. Consequently, the water in your glass today might have quenched the thirst of a creature from the age of dinosaurs. This constant circulation is a fundamental process: water journeys through the Earth as rain, snow, sleet, and hail, flowing between oceans, lakes, rivers, glaciers, and back again. Scientists refer to this continuous movement as the water cycle – a rather apt name, wo