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Another year <a href=" http://julietmckeephotography.co.uk/index.php/differin-gel-3-generic.pdf ">differin coupon lotion</a> Unlike the lung power and vocal chords that give a child´s scream its energy, the volcano´s scream comes from its harmonic tremor. According to Diana Roman, a volcanologist at the Carnegie Institution of Washington, you can think of the tremor as a series of really weak earthquakes. "A single earthquake lasts only for a few seconds, but tremors can last minutes," she told ABC News. |
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