NASA's Perseverance rover is still exploring Mars without its flying companion, moving slowly but steadily along the shore of an ancient river that fed the lake in Jezero Crater. That was, until ...

Charles Jones, a professor in the University of Pittsburgh Department of Geology and Environmental Science, says flat land in Pittsburgh that's not right along a river is usually an ancient river bed.

Deep-sea explorers off the Gulf of Alaska found evidence of a “river bed” in a part of the ocean that has never been above sea level. What caused it? One theory is an ancient and powerful mud ...

Image taken by the HiRISE camera shows a portion of the Mawrth Vallis that contains teh remnants of an ancient river bed ...

Pasadena, California (CNN) — A raging river might have cut across Mars billions of years ago. The Perseverance rover has captured new images that appear to reveal geologic evidence of a fast ...

The second artifact found on the other side of the ancient river bed was a .07 inch thick flake of flint that the archaeologists think was cut off when a stone tool was being made.

Pasadena, California (CNN) — A raging river might have cut across Mars billions of years ago. The Perseverance rover has captured new images that appear to reveal geologic evidence of a fast ...

There are few more potent reminders that Mars used to be a wet world than seeing ancient, dried up river beds etched into the red planet’s surface. Although this particular example has been ...

Kite and colleagues found a variety of ages for the rivers, which they judged based on the age of a given crater formation and how much an ancient river bed had eroded it, transporting sediment ...

Mars was once crisscrossed with rivers twice as wide as any on Earth, according to a new study, and some were filled with water as “recently” as 1 billion years ago, suggesting the red … ...