Posted by Mount Etna, the most active volcano in Europe, has been erupting off and on since early July. Although the volcano erupts often, the lava moves slowly, so there almost never any danger. The volcano has become more active during the last 50 years.
Read more about Mount Etna and see more pictures on National Geographic News.
Think you know the ins and outs of volcanoes? Quiz Your Noodle and find out!
Photograph by Marcello Paternostro, AFP/Getty Images
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