You are using an older browser version. Please use a supported version for the best MSN experience.

What mud bubbles tell us about volcanos

Fountains of lava from Mount Etna have regularly lit up the Sicilian night sky since December, and scientists say that mud pools a few miles from Europe's tallest active volcano hold the key to predicting what it will do next. Emily Wither reports.
image beaconimage beaconimage beacon