The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
The Caspian Sea is also classed as the world's largest lake.
52
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Even Antarctica has an area code. It's 672.
58
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
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
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41