There's a lake under Antarctica that is 25 million years old called Lake Vostok.
109
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
Mexico City is built on top of an underground resevoir!
47
Due to gravitational effects, you weigh slightly less when the moon is directly overhead.
55
In 1850, only 8% of the people in California were women.
0
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41