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

2) The insurance industry is one of the oldest industries in the world, with roots dating back thousands of years.

3) The world's oldest university, Al-Qarawiyyin, was founded in 859 AD and is located in Fez, Morocco.

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