1) The Appalachian Mountains, running along the eastern coast of the United States, are one of the oldest mountain ranges in the world.

2) Usain Bolt of Jamaica holds the world records for the 100 meters and 200 meters sprints, with times of 9.58 seconds and 19.19 seconds, respectively.

3) The Great Barrier Reef in Australia is the largest living structure on Earth and can be seen from space.

4) A group of flamingos is called a "flamboyance."