The past was disgusting. Sewage ran into the rivers people bathed in. Doctors drank their patients' urine to diagnose them. This title has plenty of nasty facts to gross you out.

Take a tour of the ugly, smelly, and nasty with the World’s Grossest series—part of the UpDog BooksTM collection. You’ll learn the world’s most revolting facts about history, animals, human bodies, and more. Check out each book’s disgusting diagram and compare icky topics to decide which is grosser.