http://blogs.discovermagazine.com/discoblog/2009/11/30/crazy-optical-illusion-of-the-day/ Sat, 11 May 2013 22:50:00 +0000 hourly 1 http://wordpress.org/?v=3.4.2 http://blogs.discovermagazine.com/discoblog/2009/11/30/crazy-optical-illusion-of-the-day/#comment-20296 Paul Lamb Tue, 01 Dec 2009 18:34:24 +0000 http://blogs.discovermagazine.com/discoblog/?p=4190#comment-20296 Mach bands? Mach bands?

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