Italy's Mount Etna erupts
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An eruption occurred on Mount Etna in Sicily, Italy on Saturday, releasing huge plumes of volcano lava. /VCG Photo

An eruption occurred on Mount Etna in Sicily, Italy on Saturday, releasing huge plumes of volcano lava. /VCG Photo

Mount Etna is Europe's highest and most active volcano. /VCG Photo

Mount Etna is Europe's highest and most active volcano. /VCG Photo

Mount Etna has one of the world's longest documented records of historical volcanism and it was added to the list of UNESCO World Heritage Sites in 2013. /VCG Photo

Mount Etna has one of the world's longest documented records of historical volcanism and it was added to the list of UNESCO World Heritage Sites in 2013. /VCG Photo