The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
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Europe is the only continent without a desert.
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The Atlantic Ocean is saltier than the Pacific Ocean.
54
The Caspian Sea is also classed as the world's largest lake.
52
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
Every year, Alaska has about 5,000 earthquakes.
31