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Petroglyphs in the Tucson mountains.
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John Weirich discovers a naughty petroglyph.
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A pretty view in the Tucson mountains.
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University of Colorado (Boulder) campus.
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Another CU-Boulder view.
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View from my hotel balcony at the Lunar and Planetary Science Conference (Houston).
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Ivy, the seeing eye dog of Jim Richardson (my former officemate) fetching my sneaker.