Attack on the pentagon results in discovery of new mathematical tile | Science | The Guardian

http://www.theguardian.com/science/alexs-adventures-in-numberland/2015/aug/10/attack-on-the-pentagon-results-in-discovery-of-new-mathematical-tile

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First saved: 2015-Aug-12 (Wed)
Last checked: 2015-Oct-27 (Tue), response 200