A webcomic of romance, sarcasm, math, and language. Special 10th anniversary edition of WHAT IF?—revised and annotated with brand-new illustrations and answers to important questions you never thought to ask—coming from November 2024. Preorder here!

A webcomic of romance, sarcasm, math, and language. What If? is now on YouTube! Check out the first video for the answer to “What if we aimed the Hubble Telescope at Earth?” and follow xkcd’s What If? The Video Series channel to be notified about each new video.