What If? Serious Scientific Answers to Absurd Hypothetical Questions by Randall Monroe

Have you ever wondered:

  • If every person on Earth on Earth aimed a laser pointer at the Moon at the same time, would it change color?
  • How much Force power can Yoda output?
  • How high can a human throw something?
  • Which US state is actually flown over the most?
  • What would happen if you drained all the water on Earth and dropped it on top of the Curiosity rover on Mars?

Physicist and creator of the webcomic xkcd supplies you with scientific answers to all the questions you never knew you wanted to ask.