In 1850, only 8% of the people in California were women.
0
Australia's Great Barrier Reef is 1,250 miles long!
45
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
The city of Houston, Texas is built on a swamp and is slowly sinking!
89
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
In one day, a full grown redwood tree expels more than 2 tons of water through its leaves.
56
Europe is the only continent without a desert.
62