1) The windshield wipers were invented by a woman named Mary Anderson in 1903.

2) The largest living structure on Earth is the Great Barrier Reef, spanning over 2,300 kilometers (1,400 miles) along the coast of Australia.

3) The word "mountain" contains three vowels: O, U, and A.

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).