The city of Houston, Texas is built on a swamp and is slowly sinking!
89
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The average ice berg weighs 20,000,000 tons!
54
Connecticut and Rhode Island never ratified the 18th Amendment (Prohibition).
25
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Even Antarctica has an area code. It's 672.
58
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175