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September 25, 2009SGU 5x5 #78 - Sep 23 2009898 hours 49 minutesPlayCrop Circles...moreShareView all episodesBy Dr. Steven Novella4.8240240 ratingsSeptember 25, 2009SGU 5x5 #78 - Sep 23 2009898 hours 49 minutesPlayCrop Circles...more