Because of its enormous size, the Pentagon operates much like a small city; it has its own shopping mall, power plant, water and sewage facilities, medical clinic, fire station, police force and a mayor.

In the U.S., there are about 15,000 vacuum cleaner-related accidents each year.

The bumblebee bat is not only the world's smallest bat, but it is also the world's smallest mammal. These cute little creatures weigh only 2 grammes. They are 29 to 33mm in length, with a wingspan of approximately 170mm!

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