Volcanologists climb into the caldera of Mount Nyiragongo, an active and unstable volcano, to collect samples the will help determine when, where and how it is likely to erupt next. Two million souls in the nearby city of Goma depend on ...See moreVolcanologists climb into the caldera of Mount Nyiragongo, an active and unstable volcano, to collect samples the will help determine when, where and how it is likely to erupt next. Two million souls in the nearby city of Goma depend on the results. Written by
David Foss
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