Mexico City is built on top of an underground resevoir!
47
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
The Atlantic Ocean is saltier than the Pacific Ocean.
54
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
There are approximately three chickens for every human on Earth.
13
It's still possible to see the division between East and West Germany due to different light bulbs.
5
Forest fires move faster uphill than downhill.
52