Top 10 Longest Rivers In The World A river is a natural stream of freshwater which discharges into the ocean, seas, major lakes and desert basins. A river might have its source in spring, lakes, a glacier or marsh. They are known as the primary channel or the largest distributaries in the drainage system. Rivers are extremely important in shaping the history of the world. Most of the ancient civilizations have developed and flourished along the largest rivers on earth. The rivers have been … [Read more...]