Duncan Caldwell has helped to decipher some of the most enigmatic works of prehistoric American iconography: the twelve Adena Tablets from the central Ohio watershed. The lecture will take the audience into the heart of a civilization so great that it made earthworks which dwarf almost any other archaeological vestiges on the planet, including the Egyptian pyramids. We will look at structures 60 miles long and as small as a postcard; structures as simple as huge conjoined circles and squares and as tightly packed with imagery mirrored simultaneously in two directions that the tablets look like Escher illustrated vultures, body parts and spaghetti.
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