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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Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
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Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
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It takes a drop of ocean water more than 1,000 years to circulate around the world.
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The Atlantic Ocean is saltier than the Pacific Ocean.
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The Sahara desert expands at about 1km per month.
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
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