The Atlantic Ocean is saltier than the Pacific Ocean.
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The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
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
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8