Smoke rings from a volcanic vortex are a sight for visitors to Mount Etna.
Mount Etna, in southern Italy, dazzles tourists with a show of rings formed by volcanic vortex eruptions. According to scientists, recent activity set up the ideal circumstances for the unusual event.
USDA releases information on bird flu, links bird virus to cattle movement The US Department of Agriculture has released updates regarding the avian flu virus circulating among dairy cattle. See to learn more.
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