Randall Munroe, the creator of the wildly popular xkcd.com, is back with even more hilarious and informative answers to important questions you probably never thought to ask. What would happen if the solar system was filled with soup? How many people would it take to build Rome in a day? C ould you build a lava lamp out of real lava? If the Earth was a massive eye how far would it see? Millions visit xkcd.com each week to read Randall Munroe's iconic webcomic. Fans ask him a lot of strange questions; in pursuit of answers, Munroe runs computer simulations, pores over stacks of declassified military research memos, solves differential equations and consults nuclear reactor operators. His responses are masterpieces of clarity and hilarity, complemented by comics. They often predict the complete annihilation of humankind, or at least a really big explosion.