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
Even Antarctica has an area code. It's 672.
58
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62