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How do 3D glasses work

A visit to the toilet is included in Professor Phil Moriarty’s explanation of 3D glasses. How do 3D films give us that three dimensional effect?


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Sixty Symbols videos by Brady Haran

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http://www.youtube.com/periodicvideos (Chemistry stuff)
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http://www.youtube.com/foodskey (Food science)
http://www.youtube.com/BackstageScience (Big science facilities)
http://www.youtube.com/favscientist (Favourite scientists)

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