* The most dangerous animal in the world is the common housefly. *
* Snakes are true carnivorous because they eat nothing but other animals. *
* The world's largest amphibian is the giant salamander. It can grow up to 5 ft. in length. *
* The longest cells in the human body are the motor neurons. They can be up to 4.5 feet (1.37 meters) long and run from the lower spinal cord to the big toe. *
* The largest man-made lake in the U.S. is Lake Mead, created by Hoover Dam. *
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