A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The Atlantic Ocean is saltier than the Pacific Ocean.
54
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
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
Europe is the only continent without a desert.
62