Serious Scientific Answers to Absurd Hypothetical Questions
What if you took a swim in a spent-nuclear-fuel pool? How long could the human race survive on only cannibalism? What if you had all the money in the world? Could you build a jetpack using downward-firing machine guns?

These and other important questions have been regularly answered on the XKCD What If site for some time. And now, you can get it as a proper book. And what if you don’t want an actual book? You can get the non-physical version on Google Play or iTunes/iBooks.