1) The Dow Jones Industrial Average (DJIA) is a stock market index that tracks the performance of 30 large, publicly owned companies in the United States.

2) Marilyn Monroe, born Norma Jeane Mortenson, was an iconic American actress, model, and singer, known for her beauty, charisma, and tragic personal life.

3) The Super Bowl is the championship game of the National Football League (NFL) in the United States and is one of the most-watched television events each year.

4) The Great Barrier Reef in Australia is the largest coral reef system in the world and is visible from space.