Who decided what pen colors were professional? Do you have any advice for stage fright? If you dropped something in a hole drilled all the way through earth, where would it end up? How does one's internal clock work? How long should I wait for someone to call me back? Should I put a plot twist in my book? How long would it take shoeless humans to evolve foot pads like dogs? Hank Green and John Green have answers!

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Follow us on Twitter! twitter.com/dearhankandjohn

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