Rivers and lakes are storehouses of fresh water. They are also important habitats for fishes, birds, and mammals. It is no wonder that rivers have been our lifelines since ancient times, playing an important role in the growth of civilizations. Take a cruise on the world s greatest rivers and learn about the deepest and largest lakes. Discover the origins of rivers, their stages, the life they support, and the benefits they provide us. Also learn how these precious water bodies are threatened by human activities.