1) The Sahara Desert, located in North Africa, is the largest hot desert in the world, covering an area of about 9.2 million square kilometers (3.6 million square miles). It is characterized by vast stretches of sand dunes, rocky plateaus, and extreme temperatures.

2) Aztec mythology, originating from ancient Mesoamerica, includes deities like Quetzalcoatl, Huitzilopochtli, and Tlaloc. It explores concepts of creation, sacrifice, and the cyclical nature of time, with intricate cosmology and rituals forming a significant part of Aztec religious beliefs and practices.

3) The musical "The Phantom of the Opera" has been running in London's West End since 1986, making it the longest-running musical in history.

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