I wrote: >NASA's having a press conference to announce "an astrobiology >finding that will impact the search for evidence of extraterrestrial >life" on Thursday, 2 Dec at 2 PM EST. Probably this: <http://blogs.discovermagazine.com/80beats/2010/11/29/cassini-probe-detects-a-wispy-oxygen-atmosphere-on-saturns-moon-rhea/> -- David.