A volcano has enough power to shoot ash as high as 50 km into the atmosphere.
59
Every year, Alaska has about 5,000 earthquakes.
31
Even Antarctica has an area code. It's 672.
58
Australia's Great Barrier Reef is 1,250 miles long!
45
The longest cave in the world is the 'Mammoth Cave System' in the USA at 560,000 mtrs deep!
63
The North Atlantic gets 2.5 centimetres (1in) wider every year.
119
Forest fires move faster uphill than downhill.
52