ISTANBUL Saturn’s small, cratered moon, Mimas, may secretly harbor a young subsurface ocean -- a finding that could reshape how scientists define ocean worlds in the solar system, new research suggested. “When we look at Mimas, we don’t see any of the things that we’re accustomed to seeing in an ocean world,” Alyssa Rhoden, a planetary scientist at the Southwest Research Institute (SwRI) in the US state of Colorado, said at the Europlanet Science Congress-Division for Planetary Sciences meeting