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Geochemist Susan Humphris chips fresh, glassy lava from seafloor rocks collected using Alvin. The chips will be analyzed on shore to determine their chemical composition. (Photo by Amy Nevala)


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Geochemist Susan Humphris chips fresh, glassy lava from seafloor rocks collected using Alvin. The chips will be analyzed on shore to determine their chemical composition. (Photo by Amy Nevala)

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