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Filtered sunlight gives off a blue aura inside a fumarole
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Filtered sunlight gives off a blue aura inside a fumarole

May 7, 2010
Filtered sunlight gives off a blue aura inside a fumarole (an ice tube formed around a volcanic steam vent) atop Mt. Erebus in Antarctica, the Earth's southernmost active volcano. The United States maintains three research stations on Antarctica. The National Science Foundation operates them all.


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