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Ten ways Mount St. Helens changed our world—The enduring legacy of the 1980 eruption https://t.co/6gjn2TmjnS
Ten ways Mount St. Helens changed our world—The enduring legacy of the 1980 eruption https://t.co/6gjn2TmjnS
RT @USGS_YES: Today is the 41st anniversary of the May 18, 1980 eruption of Mount St. Helens. Learn 30 cool facts about Mt. St. Helens at h…
RT @USGS_YES: Today is the 41st anniversary of the May 18, 1980 eruption of Mount St. Helens. Learn 30 cool facts about Mt. St. Helens at h…
RT @USGS_YES: Today is the 41st anniversary of the May 18, 1980 eruption of Mount St. Helens. Learn 30 cool facts about Mt. St. Helens at h…