An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The Atlantic Ocean is saltier than the Pacific Ocean.
54
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181