The Sahara desert expands at about 1km per month.
90
There are more than 50,000 earthquakes throughout the world every year!
47
The Caspian Sea is also classed as the world's largest lake.
52
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Every year, Alaska has about 5,000 earthquakes.
31
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61