The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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The warmest temperature ever recorded on Antarctica was 3 degrees F.
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It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
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
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109