What If?: Serious Scientific Answers to Absurd Hypothetical Questions

From the creator of the wildly popular webcomic xkcd, hilarious and informative answers to important questions you probably never thought to ask.

Millions of people visit xkcd.com each week to read Randall Munroe’s iconic webcomic. His stick-figure drawings about science, technology, language, and love have a large and passionate following.

Fans of xkcd ask Munroe a lot of strange questions. What if you tried to hit a baseball pitched at 90 percent the speed of light? How fast can you hit a speed bump while driving and live? If there was a robot apocalypse, how long would humanity last?

In pursuit of answers, Munroe runs computer simulations, pores over stacks of declassified military research memos, solves differential equations, and consults with nuclear reactor operators. His responses are masterpieces of clarity and hilarity, complemented by signature xkcd comics. They often predict the complete annihilation of humankind, or at least a really big explosion.

The book features new and never-before-answered questions, along with updated and expanded versions of the most popular answers from the xkcd website. What If? will be required reading for xkcd fans and anyone who loves to ponder the hypothetical.

Randall Munroe is the author of the webcomic xkcd and the New York Times bestsellers What If?, What If? 2, Thing Explainer, and How To. A former NASA roboticist, he left the agency in 2006 to draw comics on the internet full time. The International Astronomical Union has named an asteroid after him; that asteroid, 4942 Munroe, is large enough that it could cause widespread devastation if it were to hit Earth. He lives in Massachusetts.