It’s a bird, it’s a plane, it’s a … river in the sky? It sounds strange, but it’s true. Atmospheric rivers are airborne streams of water vapor that flow through the sky. The term was first coined in a ...

Ancient Mars once teemed with flowing rivers, forming vast drainage systems. A new study has mapped these large basins, ...

O'FALLON, Mo. -- The nation's two largest rivers top a new listing of the most endangered waterways, according to a report released Tuesday. The Washington, D.C.-based conservation organization ...

ST. LOUIS — The St. Louis region is surrounded by significant waterways, but the rivers are often underestimated in their influence on the region's weather and climate. The nation's two largest rivers ...

The enormous Mississippi River, the 13th largest river in the world in terms of flow, occupies a central place in U.S. geography, economy and culture. The river is a huge part of the country's ...

New research shows that over the past 35 years, 44 percent of the largest downstream rivers have seen massive changes in the amount of water flowing through them annually. The cause of these rapid ...

The third largest river in Virginia is the sixth most endangered in the U.S., according to one nonprofit environmental group. The Rappahannock River, Virginia’s longest free-flowing river that runs ...

The nearly 3 million rivers that weave across the world are experiencing rapid and surprising changes, with potentially drastic implications for everything from drinking water supplies to flood risks, ...

The Rappahannock River, Virginia's third largest, is listed as the sixth most endangered river in the U.S. by American Rivers. Declining groundwater levels and lack of comprehensive water supply ...