One cubic mile of seawater contains about 50 pounds of gold.
79
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
There are more than 50,000 earthquakes throughout the world every year!
47
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
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The Amazon rainforest produces more than 20% the world's oxygen supply.
182