In this snack break,  Dan revisits his conversation with Tracy C Dyson (no relation to Sir James Dyson from the last episode). Tracy breaks down what it actually feels like to be launched off the planet and step into literal nothingness on a spacewalk. Plus, she also settles the debate once and for all: the Earth is extremely, unambiguously round. Learn more about your ad choices. Visit megaphone.fm/adchoices