It takes a drop of ocean water more than 1,000 years to circulate around the world.
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More than 25% of the world's forests are in Siberia.
51
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The state of Florida is bigger than England!
74
There are more than 50,000 earthquakes throughout the world every year!
47
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63