Icy Enceladus hides a watery ocean The water vapour photographed multiple times by NASA's Cassini probably originated in a vast underground ocean. A body of water as wide as Lake Superior and as deep as the Mariana Trench bolsters search for life on Saturn moon. 03 April 2014 http://www.nature.com/news/icy-enceladus-hides-a-watery-ocean-1.14985 [with comment]