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(repeat) There\u2019s evidence for a subsurface lake on Mars, and scientists are excitedly using the \u201ch\u201d word.\xa0Could the Red Planet be habitable, not billions of years ago, but today?\xa0While we wait \u2013 impatiently \u2013 for a confirmation of this result, we review the recipe for habitable alien worlds. For example, the moon Titan has liquid lakes on its surface.\xa0Could they be filled with Titanites?\nDive into a possible briny, underground lake on Mars \u2026 protect yourself from the methane-drenched rain on a moon of Saturn \u2026 and cheer on the missed-it-by-that-much planets, asteroids Ceres and Vesta.\nAlso, do tens of billions of potentially habitable extrasolar planets mean that Earth is not unique?\nGuests:\n\n\nNathalie Cabrol\xa0\u2013\xa0Planetary scientist, Director of the Carl Sagan Center for the Study of Life in the Universe at the SETI Institute\n\n\n Jack Holt\xa0\u2013\xa0Geophysicist, Lunar and Planetary Laboratory, University of Arizona\n\n\n Jani Radebaugh\xa0\u2013\xa0Planetary scientist and professor of geology, Brigham Young University\n\n\nMarc Rayman\xa0\u2013\xa0Mission Director and Chief Engineer of NASA\u2019s Dawn Mission\n\n\nPhil Plait\xa0\u2013\xa0Astronomer, blogger, and widely known as the Bad Astronomer\n\n\nLearn more about your ad choices. Visit megaphone.fm/adchoices