In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
One cubic mile of seawater contains about 50 pounds of gold.
79
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The Caspian Sea is also classed as the world's largest lake.
52
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
Forest fires move faster uphill than downhill.
52