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

2) The game of basketball was invented by Dr. James Naismith in 1891 and has since grown into a global sport played at both amateur and professional levels.

3) The word "elephant" contains three vowels: E, A, and E.

4) The largest insurance market in the world is Lloyd's of London, which is not an insurance company but a market where insurance brokers and underwriters come together.