If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59