What If? by Randall Munroe

Explore scientific answers to hypothetical questions with "What If?" by Randall Munroe, the creator of the blog xkcd. This is a great compendium of answers to questions that often don't have an immediate answerr, like "What if a Richter 15 earthquake hit New York City?" or "What would happen if someone's DNA vanished?"" Compelling and entertaining science for all ages -- and answers to some of life's greatest hypothetical questions. In like-new condition.