My current reading the book version of XKCD’s What If?: Serious Scientific Answers to Absurd Hypothetical Questions. The website and the book is a gold mine for those who’ve always had curious questions they were too embarrassed to ask out loud. Face it, we all have had those.
Take this one:
If you suddenly began rising steadily at one foot per second, how exactly would you die? Would you freeze or suffocate first? Or something else?
While you can find the answer here, I really enjoyed that Randall Munroe used giraffes to illustrate some points.
What type of hypothetical question would you ask a scientist? I think mine would probably be: How much bacon could I eat and still live?.