1) The NBA (National Basketball Association) is widely regarded as one of the most popular and competitive professional basketball leagues in the world.

2) The first modern health insurance policy was introduced in Germany in the late 19th century.

3) 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.

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