Deputy editor of The Economist Tom Standage's new book is A Brief History of Motion: From the Wheel, to the Car, to What Comes Next. It is in fact, five and a half thousand years of the history of land-based human transport, from the invention of the wheel all the way through to the driverless car, analysing the very significant social impacts along the way. And just to make it even more fun, Tom has included some transport trivia here, including: why red means stop (and green mean go), why countries drive on the left or the right, and that electric cars were initially marketed to women.