This week, we welcome renowned physicist Dr. Lawrence Krauss, the author of The Physics of Star Trek, to the show, talking about his new book, The Physics of Climate Change.But first, we're going to take a look at a new study that may have found the final resting place of the ancient water of Mars. In other watery news, we look at how life may be hiding on ocean worlds within our own solar system. Finally, we'll take another glimpse at Oumuamua, the odd body which visited our family of planets in 2017.Listen to the podcast here, or watch the video version of this episode: https://youtu.be/rN1GDBHyhsw--- Send in a voice message: https://anchor.fm/the-cosmic-companion/messageSupport this podcast: https://anchor.fm/the-cosmic-companion/support Get full access to The Cosmic Companion at thecosmiccompanion.substack.com/subscribe