An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The state of Florida is bigger than England!
74
One cubic mile of seawater contains about 50 pounds of gold.
79
The average ice berg weighs 20,000,000 tons!
54
The Sahara desert expands at about 1km per month.
90
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
More than 25% of the world's forests are in Siberia.
51