1) The Appalachian Mountains, running along the eastern coast of the United States, are one of the oldest mountain ranges in the world.

2) The insurance industry plays a crucial role in risk management by providing financial protection against various risks, such as accidents, natural disasters, and liability claims.

3) A single bolt of lightning can heat the surrounding air to temperatures five times hotter than the surface of the sun.

4) The world's first stock exchange was established in Amsterdam in 1602.