I've come across references to the TES temperature data in several places lately, and, in principle, it sounds promising for the prospects of liquid water. But I'd be the first to admit that my knowledge of the chemistry involved is only basic enough to recognize plausibility when I hear it, but not sufficient to be able to honestly claim an opinion. It seems reasonable that at certain places, at certain times, and under certain circumstances, liquid water is possible on Mars; but it's beyond me to say whether a given picture of channels and dark soil indicates such a thing. Now, show me an image of a channel overflowing with frothy whitewater, with billowing clouds of vapor, preferably in two or more overlapping images, and you can sign me up in a heartbeat. If only twere that easy....

--Robert