《不可思议的事实百科全书》为所有小知识迷准备了500个令人困惑的问题，快来用这些问题测测自己掌握了多少知识吧。

你的肚脐眼里有多少种细菌？哪种动物的小睡长达三年之久？如果有人让你抽出一zeptosecond的时间，那会是多长时间呢？比萨斜塔曾经是直的吗？宇航员的脏衣服到底是怎么处理的？

这些令人眼花缭乱的事实配有颜色鲜艳、异想天开的插图，问题被分为10个章节：人体、科学和技术、动物、自然世界、太空、令人费解的东西、历史、习俗和文化、我们的世界、艺术和娱乐。

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.