There's a lake under Antarctica that is 25 million years old called Lake Vostok.
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The Niagara Falls moves upstream at an average rate of about 295ft a century!
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In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
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The Caspian Sea is also classed as the world's largest lake.
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Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
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Australia's Great Barrier Reef is 1,250 miles long!
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10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
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