1) The national animal of Australia is the kangaroo.

2) The longest-running TV show in history is "The Simpsons," which has been on the air since 1989 and has over 700 episodes.

3) The New York Stock Exchange (NYSE) is the largest stock exchange in the world.

4) The world's largest desert is the Sahara Desert in Africa, covering an area of about 3.6 million square miles (9.4 million square kilometers).