Should we be more worried? Scientists are counting down the hours until a major volcano erupts in Iceland with bated breath. It is not the only volcano that could shut down our world.
Hours to go before Iceland volcano erupts
Sleeping giant: The Fagradalsfjall volcano (above) could obliterate the entire town of Grindavik. Glossary
Molten - Liquefied by heat.
Meteorological - Meteorology is the science of weather.
Extinction - Completely dying out.
Ferocity - Savagery; brutality.
Tsunami - A Japanese word describing a succession of waves caused when an earthquake or volcano displaces a large body of water.
Density - The compactness of a substance or object.