Some lions mate over 50 times a day.

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Diamonds are the hardest known substance.

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The largest flying animal was the pterosaur which lived 70 million years ago. This reptile had a wing span of 36-39 feet (11-11.9 meters) and weighed 190-250 pounds (86-113.5 kilograms).

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There's enough gold in the Earth's crust to cover the entire land surface knee-deep.

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Rats multiply so quickly that in 18 months, two rats could have over 1 million descendents.

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Interstellar space is not complete vacuum: there are a few hydrogen atoms per cubic centimeter.

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Katmandu is the capital of Nepal.

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The giraffe is one of the quietest animals: it has no vocal chords to make any noise.

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The acceleration rate of a flea's jump is 20 times that of a space shuttle during launch.

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The sun is 330,330 times larger than the earth.

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