1) The French Revolution, which began in 1789, marked a major turning point in European history, leading to the overthrow of the monarchy and the rise of republicanism.

2) The world's first paper money was created in China over 1,000 years ago.

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

4) Cyclones are fueled by warm ocean waters and atmospheric conditions that allow the formation of thunderstorms.