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

2) The musical "Les Misérables" is one of the longest-running shows in the West End and Broadway, with over 13,000 performances.

3) The game of rugby originated at Rugby School in England and has since evolved into different versions, including Rugby Union and Rugby League.

4) Orchids are one of the largest families of flowering plants, with over 25,000 species.