Filled with the most useless and entertaining facts found on Wikipedia, containing more than 600 quirky facts about anything and everything from the internet’s user-contributed information source. From the nonsensical to the esoteric and the completely incorrect, the trivia includes: The Underground City in Beijing is a bomb shelter said to accommodate 6 million people; The Boreray is the most critically endangered sheep in the UK; and The Croaking Tetra is a tropical fish that chirps when it surfaces for air.