Europa’s interior is a result of tidal compression/decompression from Jupiter’s influence. It would otherwise be as dead as the Moon with extra water-ice.
19 posted on 03/24/2012 1:19:53 AM PDT by Crazieman
(Feb 7, 2008 http://www.freerepublic.com/focus/f-news/1966675/posts?page=28#28)