This is the story of a drop of water, told by a gifted science writer and illustrated with remarkable paintings. Where does this marvellous liquid come from? How does it behave? Meredith Hooper takes us back thousands of years to see where the Earth"s water came from, and how life began in the oceans and later moved onto land. She describes the water cycle, the relationship between water and living things and between water and erosion. She also discusses important environmental issues and provides a fascinating collection of water facts.