

A scientist samples groundwater at a mine site for chemical analysis. |
A biologist takes samples to test water quality. |
A paleobiologist participates in the first geologic mapping of Seymour Island in Antarctica to learn about ancient climates. |
A geologist examines deposits from the 1989-90 eruption of Alaska's Redoubt Volcano |
With the aid of a computer and a microscope, scientists analyze rock and sediment samples collected from the ocean floor |
A seismologist analyzes seismic data from earthquakes as they occur |
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