1) 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.

2) The concept of reinsurance, which is insurance for insurance companies, originated in the 17th century.

3) The shortest scheduled commercial flight lasts just 1.7 miles and connects two Scottish islands, Westray and Papa Westray.

4) The English alphabet has five vowels: A, E, I, O, and U.