Mexico City is built on top of an underground resevoir!
47
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
The Atlantic Ocean is saltier than the Pacific Ocean.
54
The Sahara desert expands at about 1km per month.
90
There are more than 50,000 earthquakes throughout the world every year!
47
The Amazon rainforest produces more than 20% the world's oxygen supply.
182
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59