Here is a thought I have not seen expressed. The article claims that this stream once had vigorous flow. I seem to remember that the Rover is currently at the BOTTOM of a crater. How do you get vigorous flow at a low spot, and if there was enough flow to be vigorous, how was it that the crater was not a lake?
That is because nasa is just making this crap up. To get real science done, we need people there in long term settlements.