A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
An earthquake on Dec. 16, 1811 caused parts of the Mississippi River to flow backwards.
243
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 city of Houston, Texas is built on a swamp and is slowly sinking!
89
The 'King Ranch' in Texas is bigger than the state of Rhode Island.
49
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63