If everything was the exact same color, would we still be able to see? Why can't I take naps in contacts? How long does it take to get to space? What would you bring to Mars? How many people are asleep right now? If atoms are mostly space, why don't I fall through my chair? 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

John has launched a new podcast project with Katie Mack! Crash Course Pods: The Universe is a new limited series podcast where Dr. Katie Mack, a theoretical astrophysicist, walks John Green through the history of the entire universe - including the parts that haven’t been written yet.

Join John and Katie as they discuss the Big Bang, cosmic dawn, black holes, and, eventually, the end of our universe.

It’s available now on at https://youtube.com/CrashCourse and wherever podcasts are available.

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

What's the best way to hold an umbrella? What do I do with a life-sized Shaq? Are humans a super-organism? Why does espresso goop smell like burnt hair? Is 26 too late to start wearing sunscreen? What is a pet to do when their person sneezes? 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