One cubic mile of seawater contains about 50 pounds of gold.
79
More than 25% of the world's forests are in Siberia.
51
Mexico City is built on top of an underground resevoir!
47
In 1850, only 8% of the people in California were women.
0
Forest fires move faster uphill than downhill.
52
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8