| The 1918 flu pandemic (January 1918 - December 1920) infected 500 around million people across the world, including remote Pacific islands and the Arctic, and killed 50 to 100 million of them - 3 to 5 percent of the world's population at the time - making it one of the deadliest natural disasters in human history. |
| Of all the words in the English language, the word 'set' has the most meanings with 464 definitions. |
| Clinomania is the excessive desire to lay in bed all day. |
| A duel between three people is called a 'truel'. |
| In one day, a human sheds 10 billion skin flakes. This adds up to approximately two kilograms in a year. |
| 'Canadian' is a restaurant slang term in US for a presumably bad tipper, i.e. "Smith just sat six Canadians in your section, dude". |
| 'Autograt' is slang for an automatic gratuity - the built-in tip that restaurants may charge in certain cases, such as for large tables. |
| An idiot is technically an adult with a mental age below 3 years, while a moron is a person with a mental age of 7 to 12 years. |
| A duffle bag is so called because the thick wool originally used to make the bags came from the Belgium town of Duffel. |
| Dr. William Maulton, the psychologist who invented the lie detector test, also created the superhero Wonder Woman in 1941. |