1) The sunflower is not a single flower but a cluster of small flowers arranged in a spiral pattern.

2) Elvis Presley, often referred to as the "King of Rock and Roll," has sold over one billion records worldwide.

3) The concept of compound interest can be attributed to the ancient Babylonians, who used it in their banking practices.

4) George Clooney is an American actor, filmmaker, and activist. He gained fame for his role in the television series "ER" and has since starred in successful films such as the "Ocean's" trilogy, "Syriana," and "Up in the Air," winning several awards for his performances.