Australia's Great Barrier Reef is 1,250 miles long!
45
The warmest temperature ever recorded on Antarctica was 3 degrees F.
175
10 of the tributaries flowing into the Amazon river are as big as the Mississippi river.
41
If Manhattan had the same population density as Alaska, there would only be 15 people living there.
138
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
If Antarctica's ice sheets melted, the worlds oceans would rise by 60 to 65 metres (200 - 210ft) - everywhere
181
