Quote:
Originally Posted by CraigS
Hmm .. the recent Cassini discovery of free oxygen in the atmosphere of Rhea would add a data point of disproof to this one, it being thought to have been created by radiolysis.
Cheers
PS: Remote observations of Europa and Ganymede also show atmospheric oxygen.
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I think you missed his point Craig. He wasn't making a statement as to the origins of Oxygen, just it's use by lifeforms