The Dallas/Ft. Worth airport is larger than New York City's Manhattan Island.
62
The state of Florida is bigger than England!
74
The average ice berg weighs 20,000,000 tons!
54
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
One cubic mile of seawater contains about 50 pounds of gold.
79
Israel's Dead Sea is 1,312 feet below sea level.
48
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Every year, Alaska has about 5,000 earthquakes.
31