Answer: Black Mamba More information: The Black Mamba can reach up to 12 miles per hour. Don't be too afraid though, the Black Mamba uses its speed to escape danger, not catch prey.
Answer: A perfect number. More information: You might also think of a perfect number as a number that is half the sum of all of its positive divisors, including itself! This definition is at least 2300 years old as it appears in Euclid's "Elements".
Answer: African Elephant More information: An African elephant's ears can grow to be six feet long and four feet wide. Elephants use their giant ears to cool themselves down in warm weather.
Answer: Carbon More information: Scientists speculate that diamonds originated from carbon dioxide atoms 100 miles below the Earth's surface more than a billion years ago.
Answer: NaCl More information: Sodium chloride (also known as salt or halite), is an ionic compound representing a 1:1 ratio of sodium and chloride ions.
