There are more than 50,000 earthquakes throughout the world every year!
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The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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Every year, Alaska has about 5,000 earthquakes.
31
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
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A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
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There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
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