Australia's Great Barrier Reef is 1,250 miles long!
45
The Sahara desert expands at about 1km per month.
90
Every year, Alaska has about 5,000 earthquakes.
31
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
One cubic mile of seawater contains about 50 pounds of gold.
79
The Niagara Falls moves upstream at an average rate of about 295ft a century!
48
There are more than 50,000 earthquakes throughout the world every year!
47