Water is the miracle molecule, and mankind has used its perfect properties to revolutionize our lives. It was our first superhighway, the lifeblood of civilization, and gives us 90% of all the power we use today. This episode reveals how the science behind water is the driving force behind history.

An epic 2-hour journey through time and space. This special pulls all that we know about science and history into one grand narrative of the universe and humanity, and uncovers the mysterious link between eight critical thresholds on the path from the Big Bang to modern civilization. And it peers into the future to see what life-changing thresholds are yet to come.