A supervolcano which has lain dormant for hundreds of years is feared to be gearing up for a massive eruption which could create a “mini ice age” for part of the planet.
Campi Flegrei near Naples in southern Italy last erupted in 1538 and has recently shown signs which have concerned scientists.
The huge volcano is only visible from the skies and currently home to around 360,000 people who live on its roof and may need to be evacuated.