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Niagara Falls moving upstream

Niagara Falls moving upstream

The Niagara Falls moves upstream at an average rate of about 295ft a century!




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Longest cave

The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!

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The Amazon rainforest produces more than 20% the world's oxygen supply.

Gold in seawater

One cubic mile of seawater contains about 50 pounds of gold.

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