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Scientists have reported an increase in earthquake activity at Mount Spurr. Mount Spurr is an active volcano [opening in Earth’s surface] in Alaska. Earthquakes are a warning sign of an eruption [outpouring of melted rock ... Read more -
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Labor Day is a holiday [a day when schools and businesses close]. It celebrates American workers. Schools close for Labor Day. Labor unions suggested Labor Day. Labor unions are groups of workers. They make sure ... Read more -
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