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
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 Sahara desert expands at about 1km per month.
90
Every person in the world can fit in Texas and be given over 1000 sq ft in which to live.
14
A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
