278: Popeulation Density

Can a whale use a snorkel? Am I getting one vaccine or two? What is Hank's job? Why do some hoodies have pockets in their pockets? How many popes per square mile does the Vatican have? Is artificial gravity possible? Hank Green 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