The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
Check your map! The Pacific entrance of the Panama Canal is farther East than the Atlantic entrance.
40
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
More than 25% of the world's forests are in Siberia.
51
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
The Amazon rainforest produces more than 20% the world's oxygen supply.
182