Experts describe 'remarkable ' discovery on Saturnian moon . Believe the moon could still have life in vast undersea oceans . Ocean is deeper than previous estimates — more than 30 miles deep . Cassini team this week said it could be bigger than Lake Superior .
Experts describe 'remarkable ' discovery on Saturnian moon . Believe the moon could still have life in vast undersea oceans . Ocean is deeper than previous estimates — more than 30 miles deep . Cassini team last year said it could be bigger than Lake Superior .