The Caspian Sea is also classed as the world's largest lake.
52
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
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
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
The Sahara desert expands at about 1km per month.
90
One cubic mile of seawater contains about 50 pounds of gold.
79
