Mexico City is built on top of an underground resevoir!
47
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Israel's Dead Sea is 1,312 feet below sea level.
48
In 1850, only 8% of the people in California were women.
0
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119