This week, our guest host is John Hodgman. John is a Famous Minor Television Personality and best-selling author, whom you likely know from his work as a correspondent on The Daily Show, his podcast Judge John Hodgman, and his many literary works -- including his upcoming book, to be released November 1st, called That Is All.

John talks of other universes with astrophysicist Dr. Neil deGrasse Tyson. Dr. Tyson is the director of the Hayden Planetarium, but the layperson likely knows him as the host of StarTalk Radio and the PBS program NOVA scienceNOW.

His upcoming projects include a new version of the TV series Cosmos -- originally hosted by Carl Sagan -- and a new book titled Space Chronicles.

He talks to us about how money for space exploration stacks up to other spending, his personal space travel dreams, the Cosmos series reboot, and more.

Jesse and Jordan are joined by Mary Roach, author of "Packing for Mars," among other best-selling books. They discuss the committed onanism of a particular space chimp, Thor, Werner Herzog and more.

Mary Roach is the author of several best-selling books of science journalism, including Stiff (about cadavers) and Bonk (about sex). Her most recent is Packing for Mars: The Curious Science of Life in the Void. It's an investigation of the science of human travel in space, from the high-minded (cosmic rays, interpersonal relationships, muscle degeneration) to the less-high-minded (farts, poops, barfs).