compelling animation.
Nothing like the fourth dimension to bring the idea alive. I was struck by the erosion downstream, where it sure looks like the streams have eaten into some low(?) material. And the way flow followed contours, especially in a few places where it was constricted and then opened out again. Time plus the longer-scale effects make the case for liquid, and I guess "salty liquid water" is the prevailing view. These days.
Sweet. Thanks, podrock.