Mexico City is built on top of an underground resevoir!
47
The Sahara desert expands at about 1km per month.
90
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
In 1850, only 8% of the people in California were women.
0
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175