On Earth, in contrast, nearly every river of similar size has a delta ... may also play an equally large role in preventing delta formation. And missing deltas aren't the only mystery raised ...

A rock containing many smaller round stones could indicate that there was once a large amount of liquid water on the Red Planet.

The crystals were found in the Shenandoah formation, a sedimentary fan system believed to be the remnants of an ancient lake and river delta. Since landing in February 2021, Perseverance has ...

What processes could be responsible for Saturn’s largest moon, Titan, lacking river deltas as seen on Earth ... to ascertain a better understanding of the formation and evolution of Titan’s coastlines ...