1) The concept of gravity was famously described by Sir Isaac Newton after an apple fell on his head.

2) The United Nations (UN) is an international organization founded in 1945 with the goal of promoting peace, security, and cooperation among nations through diplomatic and political means.

3) The musical "Hamilton" has won numerous awards, including 11 Tony Awards and the Pulitzer Prize for Drama.

4) The concept of insurance dates back to ancient times when merchants would distribute their goods across different ships to reduce the risk of losing everything in a single event.