Methane
Sounds like there may be an announcement very soon. Could all that methane be leaking from remnant underground life in caves?
Just how complex could life get assuming:
1) hypersalinity
2) weak but significant geothermal energy
3) radioisotopic decay
4) relatively low temperature, say 278.15K
5) life started approximately the same time as Earth, say between 3 and 4GY ago.
Biting the hand that feeds IT
