Mexico City is built on top of an underground resevoir!
47
Europe is the only continent without a desert.
62
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
Every year, Alaska has about 5,000 earthquakes.
31
Check your map! Virginia extends farther west than West Virginia.
67
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
In 1850, only 8% of the people in California were women.
0