The Caspian Sea is also classed as the world's largest lake.
52
There are approximately three chickens for every human on Earth.
13
Mexico City is built on top of an underground resevoir!
47
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
The water of the Antarctica is so cold that nothing can rot there.
334
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61