Quote:
Originally Posted by AstralTraveller
In fact the oxygen we breath is generally accepted to be other life forms waste products.
|
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.