Intelligent Design

[AAA]

Great, there's CH4, but its one of the simplest molecules, and its presence is very far from proving life existed there.

I agree, which is why I said the jury's still out. If Krasnopolsky and his colleagues are correct, the absence of areological activity doesn't really leave many alternative options other than microbial. This is what following the evidence means in this instance:

Step 1. Observation: methane on Mars
Step 2. Hypothesis: possible presence of microbial life
Step 3. Test hypothesis against observation to eliminate possibilities
Step 4. Revise or abandon hypothesis in the event of falsification

We have methane coming from vents underwater here on earth, and we know that mars has water, and used to have a lot more. Again it is just a carbon atom bonded to four hydrogen atoms. molecules more complex than that arise abiotically. I think that saying life is the only cause is premature. I guess we'll have to wait and see.