Is it possible to not have a temperature? Why isn't space hot? How big would a city have to be to hold everybody? How do I get my parents to ease up? Hank and John Green have answers!

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If you're in need of dubious advice, email us at hankandjohn@gmail.com.

Join us for monthly livestreams at patreon.com/dearhankandjohn.

Follow us on Twitter! twitter.com/dearhankandjohn