The new volume will continue in What If?’s absurd scientific footsteps, attempting to answer new questions from readers like how you’d ride a fire pole from the moon to Earth, or what would happen if ...

When the students threw up their hands, Fermi would walk them through a rough-and-ready estimation process that went something like this: If we know Chicago has a population of about 3 million, and we ...

Discover what would happen if Earth suddenly rotated 90° as a nuclear engineer reacts to XKCD’s scenario! From extreme weather changes to shifts in day and night cycles, get a detailed, science-based ...