Tristan Clum of member station KNAU reports on documenting dendroglyphs...tree carvings...near Flagstaff, Arizona. Starting in the late 1800's, sheepherders, many of from the Basque region of Northern Spain, carved basic messages or elaborate images into the bark of aspen trees in this area. Now the trees are dying, and historians are trying to compile information before it's too late.
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