- Original Caption Released with Image:
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This image taken by the navigation camera on the Mars Exploration Rover
Spirit shows the rock dubbed "Humphrey" and the circular areas on the
rock that were wiped off by the rover. The rover used a brush on its rock
abrasion tool to clean these spots before examining them with its
miniature thermal emission spectrometer. Later, the rover drilled into
the rock with its rock abrasion tool, exposing fresh rock underneath.
- Image Credit:
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NASA/JPL/Cornell/USGS
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