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

2) The study of fossils is called paleontology, and it helps us understand the history of life on Earth and the process of evolution.

3) The Bank of England, established in 1694, is the central bank of the United Kingdom and one of the oldest central banks in the world.

4) Leonardo DiCaprio is an acclaimed American actor and environmental activist. He has starred in numerous successful films, including "Titanic," "The Revenant," and "The Wolf of Wall Street," and has been recognized with several awards, including an Academy Award.