It depends what you're looking for.

some new work of mine - 700K pdf

You probably saw the overlay image when I posted it a while back. Here is me doing my best to think through what a "hot spring" on Mars would actually be like.

Because of the low atmospheric pressure, even in Hellas basin, if you bring ice up to the melting point, you have also brought it almost to the boiling point, so vapour-phase transport is going to be important.

Those who know my zeal for a CO2 model for Mars may be surprised by the tone of the article. As usual, I'm playing a double game here:

1) I'm showing what the most likely form of surface expression of H2O mobility would be on Mars, and it's not what most people expect. However, if you WANT a biological refuge on Mars then here's a perfect one.

2) Having established the search criteria and flagged one possible example, I hope that the Mars community will put some effort into searching for more of these and investigating them with detailed imagery. (having read my abstract, Ken Edgett has advised me that this particular site has been placed on the MOC "hit list" for next june when cloud conditions in Hellas improve)

I fully expect the search to fail (i.e. these are just warm spots, not active volatile discharge), but who knows...