Kepler-186f is the very first exoplanet that is both the size of our own world and in the habitable zone surrounding its star. SETI Institute scientist Elisa Quintana is lead author of the paper announcing its existence. Emily Lakdawalla describes several books about Curiosity, the Mars Science Laboratory, including her own work in progress. Bill Nye revisits a big science story that has become a tale of how science works so well. Bruce Betts is Principal Investigator for LIFE, the Living Interplanetary Flight Experiment, just chosen by NASA for study that may lead to inclusion on the Asteroid Redirect Mission. We’ve also got another Planetary Radio t-shirt for the winner of this week’s space trivia contest.