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

2) The world's largest desert is the Antarctic Desert, covering around 5.5 million square miles.

3) Banks provide various financial products, including savings accounts, checking accounts, credit cards, mortgages, and investment services.

4) The word "oxygen" contains two vowels: O and E.