1) The strongest natural material known to man is spider silk. It is stronger than steel and more flexible than nylon.

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

3) The Atlantic Ocean is the second-largest ocean and is known for its strong ocean currents, including the Gulf Stream.

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