Toynbee Tiles History Discussion
Colin Smith and Steve Weinik, along with surprise guest Justin Duerr, discuss the history of the Toynbee tiles -- and present new revelations about these mysterious artifacts -- at the Whitman Branch of the Free Library of Philadelphia on April 28, 2014.

For coverage of the event, see On Technology and Media, "Toynbee Tiles: Recent Developments and Mysteries Anew."
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