The search results show that "What if?" is the title of a book by Randall Munroe, a former NASA engineer-what-if-%E0%B8%88%E0%B8%B0%E0%B9%80%E0%B8%81%E0%B8%B4%E0%B8%94%E0%B8%AD%E0%B8%B0%E0%B9%84%E0%B8%A3%E0%B8%82%E0%B8%B6%E0%B9%89%E0%B8%99%E0%B8%96%E0%B9%89%E0%B8%B2...-Randall-Munroe-%E0%B8%AB%E0%B8%99%E0%B8%B1%E0%B8%87%E0%B8%AA%E0%B8%B7%E0%B8%AD%E0%B9%83%E0%B8%AB%E0%B8%A1%E0%B9%88-i.26554862.3736695003). The book is a collection of hypothetical questions and their scientific answers, ranging from the absurd to the thought-provoking-what-if-%E0%B8%88%E0%B8%B0%E0%B9%80%E0%B8%81%E0%B8%B4%E0%B8%94%E0%B8%AD%E0%B8%B0%E0%B9%84%E0%B8%A3%E0%B8%82%E0%B8%B6%E0%B9%89%E0%B8%99%E0%B8%96%E0%B9%89%E0%B8%B2...-Randall-Munroe-%E0%B8%AB%E0%B8%99%E0%B8%B1%E0%B8%87%E0%B8%AA%E0%B8%B7%E0%B8%AD%E0%B9%83%E0%B8%AB%E0%B8%A1%E0%B9%88-i.26554862.3736695003). The book is available for purchase at various bookstores and online retailers-what-if-%E0%B8%88%E0%B8%B0%E0%B9%80%E0%B8%81%E0%B8%B4%E0%B8%94%E0%B8%AD%E0%B8%B0%E0%B9%84%E0%B8%A3%E0%B8%82%E0%B8%B6%E0%B9%89%E0%B8%99%E0%B8%96%E0%B9%89%E0%B8%B2...-Randall-Munroe-%E0%B8%AB%E0%B8%99%E0%B8%B1%E0%B8%87%E0%B8%AA%E0%B8%B7%E0%B8%AD%E0%B9%83%E0%B8%AB%E0%B8%A1%E0%B9%88-i.26554862.3736695003).