1) The concept of self-driving cars, or autonomous vehicles, is being actively developed by companies such as Tesla, Google (Waymo), and Uber.

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

3) The United Nations (UN) is an international organization founded in 1945 with the goal of promoting peace, security, and cooperation among nations through diplomatic and political means.

4) The paella is a traditional Spanish rice dish that originated in the Valencia region. It is typically cooked in a wide, shallow pan and combines rice with various ingredients, such as saffron, vegetables, meat (like chicken or rabbit), seafood, and spices. Paella is known for its vibrant colors, aromatic flavors, and communal dining experience, often enjoyed during festive occasions and social gatherings.