Thanks to our friends at @planetarysociety for partnering with us on this episode! To support their mission and the future of space advocacy, head over to https://www.planetary.org/startalk! Could life hitchhike across planets? What color is the sky on Mars? Neil deGrasse Tyson and Bill Nye, the current CEO of the Planetary Society, team up to discuss the science and advocacy that goes into space exploration, unraveling the threads of discovery that define humanity's quest to understand the cosmos. Bill and Neil discuss the tantalizing possibility of life beneath Europa’s frozen surface, where a 4.5-billion-year-old ocean may hide secrets of alien biology. Why is this moon one of the most promising sites for life in the solar system? We explore comparative planetology and how studying Venus’s greenhouse effect helped us learn about Earth. From the groundbreaking Voyager missions to the role of cameras in space exploration, we explore some of the pivotal moments that shaped our view of the universe. Why did Bruce Murray, a co-founder of The Planetary Society, insist spacecraft carry cameras? Learn about Carl Sagan’s goal to connect the public to space exploration and how space advocacy led to the launch of the solar LightSail. And what about the search for life? From the SETI program’s hunt for intelligent signals to the possibility of Martian panspermia, the episode explores the big questions driving today’s research. Once life begins, can it ever truly stop? Bill and Neil explore how The Planetary Society continues to push the boundaries of what’s possible in space, led by science, passion, and an unrelenting Joy of Discovery (JOD). Timestamps: 00:00 - Introduction: Bill Nye 01:50 - The Origins of the Planetary Society 07:32 - People in Space 14:27 - Participating in the Process of Discovery 17:50 - The Search for Life in the Universe 22:52 - What is the Color of the Martian Sky? 32:05 - Advocating for Space Missions 39:57 - The LightSail 43:39 - Being a Science Guy 45:55 - Closing Thoughts Check out our second channel, @StarTalkPlus Get the NEW StarTalk book, 'To Infinity and Beyond: A Journey of Cosmic Discovery' on Amazon: https://amzn.to/3PL0NFn Support us on Patreon: https://www.patreon.com/startalkradio FOLLOW or SUBSCRIBE to StarTalk: Twitter: http://twitter.com/startalkradio Facebook: https://www.facebook.com/StarTalk Instagram: https://www.instagram.com/startalk About StarTalk: Science meets pop culture on StarTalk! Astrophysicist & Hayden Planetarium director Neil deGrasse Tyson, his comic co-hosts, guest celebrities & scientists discuss astronomy, physics, and everything else about life in the universe. Keep Looking Up! #StarTalk #NeildeGrasseTyson