Excellent thread.
My stance is, and has always been, that we cannot discount the possibility of life on Mars without actually putting humans on the planet to go
look.
After all microbial life has been discovered here on earth as far down as 7.5 miles into the crust. We've drilled holes and mines as deep as our
current technology allows us to, and we've found microbial life present every step of the way.
This leads scientists to ponder whether life actually started on the surface, or if it originated in the subsurface, and eventually found it's way to
the surface.
Some geologists speculate that there is as much as 10 times the amount of water trapped within Earths mantle rock as there is in all of the surface
oceans. Could the same not hold true for Mars? Perhaps conditions for martian microbial life are not ideal until 10, 15 or 20 miles below the
surface. Perhaps it's not carbon based in the first place. Perhaps, just perhaps, we know a lot less than we think we do about life in general.





My site was completely down most of the day today... power failure at the main server. Its back now but even Youtube was out for a while
today... 