Is the crust the healthiest part of bread? What would a Dear Hank letter be? How was John the one who came up with the idea for Vlogbrothers? Why do cats and dogs take small sniffs? Am I allergic to Mars? Hank Green and John Green have answers!

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

Join us for monthly livestreams and an exclusive weekly podcast at patreon.com/dearhankandjohn.

Follow us on Twitter! twitter.com/dearhankandjohn

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

See Privacy Policy at https://art19.com/privacy and California Privacy Notice at https://art19.com/privacy#do-not-sell-my-info.

What Is A Dimension And How Many Are There?