The average ice berg weighs 20,000,000 tons!
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The Sahara desert expands at about 1km per month.
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There are more than 50,000 earthquakes throughout the world every year!
47
Mexico City is built on top of an underground resevoir!
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The Atlantic Ocean is saltier than the Pacific Ocean.
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Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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