Dear Hank & John

Why don't batteries last very long? Does Spider-man have to brush his teeth? Can a goose do math? Hank and John Green have answers! 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