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
It takes a drop of ocean water more than 1,000 years to circulate around the world.
61
Australia's Great Barrier Reef is 1,250 miles long!
45
The Sahara desert expands at about 1km per month.
90
The names of the continents all end with the same letter with which they start, excluding the North and South infront of AmericA.
86