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Hmm ..
Very interesting there, Bert.
Now I know what you meant when you said (about exo-life):
"Fortunately they are too far away to hurt us" !! Food source, eh .. hmm…
I am hesitant to bring it up, but Tom Gold had a theory about bacteria living deep inside the Earth. He wrote a book called "The Deep Hot Biosphere". I think he theorised that the bacteria were living on hydrocarbons which were continually being generated by deep primordial processes, which have continued since the formation of the Earth. Fascinating read. I think it was created at a time to counter the 'peak oil' hypothesis. I had a thread with Carl on this one. I don't think geologists like Gold's theory.
Titan, eh ? Yep .. I threw that one into our answers to the school kids about possible places where life might be able to exist, (Gold's theory actually predicted it … and Titan's environment !). I'm surprised you wouldn't choose Enceladus or Europa, though, (because of the liquid water presence).
Interesting.
Cheers
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