Australia's Great Barrier Reef is 1,250 miles long!
45
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The state with the longest coastline in the Continental U.S. is Michigan.
31
It's still possible to see the division between East and West Germany due to different light bulbs.
5
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
More than 25% of the world's forests are in Siberia.
51
