References Some links for more readings.. MarsWhy Mars? - The Mars SocietyMars Fact SheetWhy we explores Mars - and what decades of missions have revealedIce Age record in MarsKepler 22BKepler Mission OverviewNASA’s Kepler Mission AnnouncementKepler 22B DatasetEuropaIngredients for LifeEuropa Mission Video and TranscriptEvidence of Ocean