The Sahara desert expands at about 1km per month.
90
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
Forest growth in the US has exceeded harvest since the 1940’s. Today, we have more trees than any time in the past 100 years.
14
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181