The average ice berg weighs 20,000,000 tons!
54
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
Forest fires move faster uphill than downhill.
52
The Caspian Sea is also classed as the world's largest lake.
52
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
The Sahara desert expands at about 1km per month.
90