In 1850, only 8% of the people in California were women.
0
Every year, Alaska has about 5,000 earthquakes.
31
A waterfall known as The Devil's Kettle empties water into a hole and nobody knows where it ends up!
18
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The Atlantic Ocean is saltier than the Pacific Ocean.
54