The warmest temperature ever recorded on Antarctica was 3 degrees F.
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The Atlantic Ocean is saltier than the Pacific Ocean.
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One cubic mile of seawater contains about 50 pounds of gold.
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The North Atlantic gets 2.5 centimetres (1in) wider every year.
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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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The Caspian Sea is also classed as the world's largest lake.
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Israel's Dead Sea is 1,312 feet below sea level.
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