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

2) The term "bull market" refers to a period of rising stock prices, while a "bear market" refers to a period of falling stock prices.

3) The oldest known musical instrument is a flute made from a bird bone, estimated to be around 43,000 years old.

4) The unicorn is the national animal of Scotland.