Sara Walker is an astrobiologist and theoretical physicist. Lee Cronin is a chemist. This is a conversation and debate about alien life and alien civilizations. Please support this podcast by checking out our sponsors: - Uncruise: https://uncruise.com/pages/lex - Linode: https://linode.com/lex to get $100 free credit - ExpressVPN: https://expressvpn.com/lexpod and use code LexPod to get 3 months free - ROKA: https://roka.com/ and use code LEX to get 20% off your first order - Athletic Greens: https://athleticgreens.com/lex and use code LEX to get 1 month of fish oil EPISODE LINKS: Sara's Twitter: https://twitter.com/Sara_Imari Sara's Website: http://emergence.asu.edu Lee's Twitter: https://twitter.com/leecronin Lee's Website: https://www.chem.gla.ac.uk/cronin Chemify's Website: https://chemify.io PODCAST INFO: Podcast website: https://lexfridman.com/podcast Apple Podcasts: https://apple.co/2lwqZIr Spotify: https://spoti.fi/2nEwCF8 RSS: https://lexfridman.com/feed/podcast/ Full episodes playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOdP_8GztsuKi9nrraNbKKp4 Clips playlist: https://www.youtube.com/playlist?list=PLrAXtmErZgOeciFP3CBCIEElOJeitOr41 OUTLINE: 0:00 - Introduction 2:08 - Aliens 16:14 - What is life? 23:56 - Assembly theory 46:24 - Math 58:06 - Communication with aliens 1:22:59 - Evolution of the universe 1:32:17 - Creating alien life 1:39:50 - Origin of life 1:46:50 - Before the Big Bang 1:53:43 - God 2:04:00 - Goal-directed behavior 2:21:58 - Time 2:30:15 - Free will and imagination 2:45:27 - UFO sightings 2:50:27 - Alien life forms debate 3:05:35 - Robots 3:14:50 - Love and emotion 3:33:16 - Beauty in science 3:43:27 - Random questions 3:52:51 - Advice for young people 3:56:09 - Life on Earth 4:00:33 - Memory SOCIAL: - Twitter: https://twitter.com/lexfridman - LinkedIn: https://www.linkedin.com/in/lexfridman - Facebook: https://www.facebook.com/lexfridman - Instagram: https://www.instagram.com/lexfridman - Medium: https://medium.com/@lexfridman - Reddit: https://reddit.com/r/lexfridman - Support on Patreon: https://www.patreon.com/lexfridman