“Understanding the Martian water cycle is critical for understanding ... Studies of the surface of Mars, with its network of channels and ripples, show that the planet was once home to rivers ...

At the very beginning of its history, Earth was dry. How did it become a blue planet? A new theory could provide an answer.

In other words, while we still have a great deal to learn about Mars’ water cycle (hydrologic cycle), this discovery points to the possibility that other stable (persistent) salt water deposits ...