Terrence MiaoTerrence Miao - 2012-02-03 17:01:19+1100 - Updated: 2012-02-03 17:01:19+1100
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Terrence Miao - 2012-02-03 17:03:16+1100
These are four perfectly round, concentric circles. This Optical Illusion Will Give You a Headache For the Next Two Hours