The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
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The state with the longest coastline in the Continental U.S. is Michigan.
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The warmest temperature ever recorded on Antarctica was 3 degrees F.
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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.
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Every year, Alaska has about 5,000 earthquakes.
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There are more than 50,000 earthquakes throughout the world every year!
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