River deltas and Lake Ayakum in Tibet are featured in this image photographed by an Expedition 27 crew member on the International Space Station. The Tibetan Plateau contains numerous lakes that dot ...

Saturn’s largest moon, Titan, is often described as one of the most Earth-like places in the solar system. It features vast river networks, expansive lakes, and a thick nitrogen-rich atmosphere. But ...

Billions of years ago, water flowed across Mars. Most scientists agree the red planet had rivers. But did those rivers flow into an ocean? New research from the University of Arkansas found strong ...