Test your knowledge with 500 perplexing questions to bamboozle and delight trivia buffs both young and old with The Encyclopedia of Unbelievable Facts.

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 dazzling facts are accompanied by bright, whimsical illustrations and the questions are organized into 10 chapters: Human Body, Science and Technology, Animals, Natural World, Space, Mindbending Stuff, History, Customs and Culture, Our World, and Arts and Entertainment.

Written in simple, easy-to-understand language by author Jane Wilsher, this stunning visual encyclopedia is ideal for fact-loving kids and a perfect excuse to bring the family together for some top trivia fun.