Hum,
The findings haven`t been declared yet so it may just be rumours...
(er, i haven`t found any information on the web yet)
But, assuming the reports are true, i would tend to think that if life did arise, then it would be almost impossible to eradicate from a planet.
The ancestral archaebacteria were probably heterotrophic, anaerobic, sulphur-dependent hyperthermoacidophiles that would have evolved as the climate changed (this would have been a gradual process, over a few million years)
"I'm simply saying that life, uh, finds a way.." [ jurassic park ]