The Caspian Sea is also classed as the world's largest lake.
50
Forest fires move faster uphill than downhill.
51
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
135
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
The Sahara desert expands at about 1km per month.
86
In 1850, only 8% of the people in California were women.
1
It takes a drop of ocean water more than 1,000 years to circulate around the world.
60
