Australia's Great Barrier Reef is 1,250 miles long!
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There are more than 50,000 earthquakes throughout the world every year!
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Forest fires move faster uphill than downhill.
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The warmest temperature ever recorded on Antarctica was 3 degrees F.
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The Caspian Sea is also classed as the world's largest lake.
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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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Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
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