The Sahara desert expands at about 1km per month.
90
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
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
Check your map! Virginia extends farther west than West Virginia.
67
Every year, Alaska has about 5,000 earthquakes.
31
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
Australia's Great Barrier Reef is 1,250 miles long!
45
More than 25% of the world's forests are in Siberia.
51