"How many kinds of germs live in your bellybutton? Which creature takes a three-year-long nap? If someone asked you to spare a zeptosecond, how long would that be? Has the Leaning Tower of Pisa ever been straight? And what exactly happens to an astronaut's dirty laundry? The . . . facts are accompanied by bright, whimsical illustrations and the questions are organised into 10 chapters: Human Body, Science and Technology, Animals, Natural World, Space,...