The average ice berg weighs 20,000,000 tons!
54
The Sahara desert expands at about 1km per month.
90
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The state with the longest coastline in the Continental U.S. is Michigan.
31
More than a dozen men have stood on the surface of the moon, but only three have been to Challenger Deep in the Marianas Trench, the deepest known spot in the ocean.
17
Every year, Alaska has about 5,000 earthquakes.
31
There are approximately three chickens for every human on Earth.
13