1) The world's most expensive car is the Bugatti La Voiture Noire, which sold for over $18 million.

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 fingerprints of koalas are so similar to humans that they have been mistaken at crime scenes.

4) 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.