Randall Munroe is a former NASA roboticist and the creator and brilliant mind behind the wildly popular xkcd, a webcomic about science, technology, and the absurdities of the modern world beloved by millions of readers. Out of this genre-defying series came his multimillion-copy-bestselling books "Thing Explainer", "How To", and "What If?", which spent a staggering 64 weeks on the New York Times bestseller list. "WHAT IF? 2" pairs clever research with charming comics to answer questions submitted by people around the world.