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1 & 2: Yes. MAHLI has imaged parts of the rover. A good example from the image archive is one taken on Sol 3204, https://mars.nasa.gov/raw_images/964387/?site=msl. 3: Yes. The full-resolution image resolves individual dust grains. The bolt heads in this image can be used as a reference to estimate grain size. So can the connector at the bottom of ...

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