The prospect of human life on Mars, once a science fiction fantasy, now seems increasingly plausible. But does actually warrant being anything other than a fantasy? This week, Adam speaks with Dr. Kelly and Zach Weinersmith, authors of A City on Mars, to discuss the practicalities of becoming a space-faring species, the challenges that lie ahead, and whether it's even a good idea to begin with. Find Zach and Kelly's book at factuallypod.com/books SUPPORT THE SHOW ON PATREON: https://www.patreon.com/adamconover SEE ADAM ON TOUR: https://www.adamconover.net/tourdates/ SUBSCRIBE to and RATE Factually! on: » Apple Podcasts: https://podcasts.apple.com/us/podcast/factually-with-adam-conover/id1463460577 » Spotify: https://open.spotify.com/show/0fK8WJw4ffMc2NWydBlDyJ About Headgum: Headgum is an LA & NY-based podcast network creating premium podcasts with the funniest, most engaging voices in comedy to achieve one goal: Making our audience and ourselves laugh. Listen to our shows at https://www.headgum.com. » SUBSCRIBE to Headgum: https://www.youtube.com/c/HeadGum?sub_confirmation=1 » FOLLOW us on Twitter: http://twitter.com/headgum » FOLLOW us on Instagram: https://instagram.com/headgum/ » FOLLOW us on TikTok: https://www.tiktok.com/@headgum