Europe is the only continent without a desert.
62
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
One cubic mile of seawater contains about 50 pounds of gold.
79
The state with the longest coastline in the Continental U.S. is Michigan.
31
The Amazon rainforest produces more than 20% the world's oxygen supply.
182