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216,347 views
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1,048,225 views
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696,053 views
2013-02-07
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107,816 views
2013-02-20
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465,972 views
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61,107 views
2013-03-06
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3,117,747 views
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2013-03-13
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958,562 views
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1,455,240 views
2013-03-18
Dear Subscribers...
264,847 views
2013-03-19
Why do we see illusions? - Mark Changizi
125,394 views
2013-03-20