In 1961, a little girl wrote a letter to JFK asking if Santa Claus was OK during the Soviet’s nuclear testing at the North Pole. Kennedy wrote back to her saying that he spoke with Santa and that he’s okay.

Although he was a devoted pacifist, Einstein wrote a letter to President Roosevelt, urging him to prioritize the development of an atomic weapon before Nazi Germany.

In the 1980s, a one letter typo cost the Yellow Pages US$10 million when they misprinted a travel agency’s advertisement for ‘exotic vacations” as “erotic vacations.”