The average ice berg weighs 20,000,000 tons!
54
The Caspian Sea is also classed as the world's largest lake.
52
In 1850, only 8% of the people in California were women.
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The Amazon rainforest produces more than 20% the world's oxygen supply.
182
One cubic mile of seawater contains about 50 pounds of gold.
79
The Sahara desert expands at about 1km per month.
90
There are approximately three chickens for every human on Earth.
13