Mexico City is built on top of an underground resevoir!
47
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
More than 25% of the world's forests are in Siberia.
51
Australia's Great Barrier Reef is 1,250 miles long!
45
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
There are approximately three chickens for every human on Earth.
13