1) Serena Williams, an American tennis player, has won a total of 23 Grand Slam singles titles, making her one of the most successful players in the history of the sport.

2) The Civil Rights Act of 1964 in the United States outlawed discrimination based on race, color, religion, sex, or national origin.

3) A single bolt of lightning can heat the surrounding air to temperatures five times hotter than the surface of the sun.

4) Johnny Depp is an American actor and producer known for his unique and versatile performances in films such as the "Pirates of the Caribbean" series, "Edward Scissorhands," and "Sweeney Todd: The Demon Barber of Fleet Street." He has received multiple accolades for his work.