The Sahara desert expands at about 1km per month.
90
Even Antarctica has an area code. It's 672.
58
The Atlantic Ocean is saltier than the Pacific Ocean.
54
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
The average ice berg weighs 20,000,000 tons!
54
One cubic mile of seawater contains about 50 pounds of gold.
79
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243