Video - Roman Facts: Urine Toothpaste and Pirate Friends

Did you know that ancient Romans used to brush their teeth with urine? They believed that the ammonia in urine would help keep their teeth clean. Roman soldiers were paid in salt, which is where we get the term "salary" from. The Romans used to watch gladiator fights for entertainment, with some of the most famous gladiators becoming celebrities. Julius Caesar was once kidnapped by pirates, but he ended up befriending them and even jokingly told them he would come back and crucify them. Ancient Romans also used lead in their plumbing system, which is believed to have contributed to the downfall of their empire.