Angel Falls in Venezuela is the worlds highest waterfall, The water of Falls drops 3,212 feet (979 meters).

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The temperature of Earth increases about 36 degrees Fahrenheit (20 degrees Celsius) for every kilometer (about 0.62 miles) you go down.

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March 14 is "Save a spider day."

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Blueberries are the second most popular berry in the United States.

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The origin of the word "volcano" is derives from Vulcan, the Roman god of fire.

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In 1783 an Icelandic eruption threw up enough dust to temporarily block out the sun over Europe.

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Earth's largest continuous mountain chain is the Mid-Ocean Ridge, stretching for 40,000 miles, rising above the surface of the water in a few places, such as Iceland. It is four times longer than the Andes, Rocky Mountains, and Himalayas combined.

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Rainforests are threatened by unsustainable agricultural, ranching, mining and logging practices.

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Tarantulas are poisonous, but the concentration of the venom in those found in North America is low enough that they're usually not a threat to human life. In fact, some people keep them as pets.

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Trees are the longest living organisms on earth.

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