Mexico City is built on top of an underground resevoir!
47
The Sahara desert expands at about 1km per month.
90
More than 25% of the world's forests are in Siberia.
51
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56