Gurgling mud pools provide window onto Mount Etna volcanic activity
Mud gurgles in pools a few kilometres away from the volcano Mount Etna at the Salinelle dei Cappuccini where pools of mud are monitored by vulcanologists to provide information on when Mount Etna will be expected to produce more volcanic activity, in Paterno, Italy, April 7, 2021. Picture taken April 7, 2021. REUTERS/Antonio Parrinello