From science fiction writers to American presidents to Elon Musk, everyone’s eager to send people to Mars. But, even if you could nail the physical aspects, are Earthlings cut out for life on Mars mentally?  Guest: Nathaniel Rich, contributing writer for New York Times magazine.  Kate Greene, author and poet Want more What Next TBD? Subscribe to Slate Plus to access ad-free listening to the whole What Next family and all your favorite Slate podcasts. Subscribe today on Apple Podcasts by clicking “Try Free” at the top of our show page. Sign up now at slate.com/whatnextplus to get access wherever you listen. Learn more about your ad choices. Visit megaphone.fm/adchoices