Mexico City is built on top of an underground resevoir!
47
Australia's Great Barrier Reef is 1,250 miles long!
45
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Forest fires move faster uphill than downhill.
52
In 1850, only 8% of the people in California were women.
0
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175