There are hundreds of rivers in the world, coursing through every possible ecosystem. Some rivers cross continents and branch tree-like into dozens of tributaries and lakes, determining the environments of whole countries. Others are as large as football fields and move water and organisms from one place to another.
Despite their varying sizes and paths, all rivers are indispensable to life on earth. Rivers are fundamental to the water cycle, provide food and water, enable ecosystems and agriculture, allow for transportation, and create the conditions for so many other benefits. Read more