CELEBRATING TEN YEARS OF THE MILLION-SELLING POP SCIENCE CLASSIC WITH A SPECIAL EDITION. THIS IS WHAT IF? . . . x10.

THE SUNDAY TIMES BESTSELLER
'Nerd royalty' BEN GOLDACRE
'Totally brilliant' TIM HARFORD
'Required reading across the world' NEW YORK TIMES

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

Fans of Randall Munroe ask him a lot of strange questions: How fast can you hit a speed bump, driving, and live? When (if ever) did the sun go down on the British Empire? When will Facebook contain more profiles of dead people than living? How many humans would a T Rex rampaging through New York need to eat a day? In p