See how U.S. rivers look when resized by water flow, revealing the dominance of the Mississippi and the surprisingly thin rivers of the West.

Add Yahoo as a preferred source to see more of our stories on Google. A study from USGS shows nutrient pollution in U.S. rivers can spend a season or longer on the landscape before it reaches a stream ...

Half a century ago, a series of landmark federal laws started reining in water pollution. As a result, some rivers across the country are bouncing back to life, but threats to clean rivers remain. U.S ...