Europe is the only continent without a desert.
62
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Venice Island was built on a foundation of tree trunks. 1200 years later, those same trunks still support almost all of central Venice.
8
Australia's Great Barrier Reef is 1,250 miles long!
45
The Caspian Sea is also classed as the world's largest lake.
52
One cubic mile of seawater contains about 50 pounds of gold.
79
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
Forest fires move faster uphill than downhill.
52