The 'Relativity' one is also quite nice: http://www.andrewlipson.com/escher/rela... | Hacker News

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bjz on July 26, 2012 | parent | context | favorite | on: Escher's "Ascending and Descending" in LEGO

The 'Relativity' one is also quite nice: http://www.andrewlipson.com/escher/relativity.html

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