But on Mars that force of change may have been something else, like wind. The ridges seen in places like the Valles Marineris floors are strange. They aren't dunes because they occur too close together, their crests are too sharp, their slopes too symmetrical. Now a few weeks later, they make this Bold New NO Discovery, in going down an avenue of water being behind these features. Or currently running water.
Clouds are water vapor, or other bulxious gases.
But from what we know as Mars, it's atmosphere has none of the bulxous poisonous gases nor the clouds made from them. But the issue is the features that NASA really was focusing in on. That was obvious. At the freezing zones, near the poles for crying out loud. If any water is there, it is all frozen, never being able to become liquid.