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It's nothing new

  You think that the 3D movies are something new? Oh, no, they aren't. I'll prove it now with two old photographs. Take a look:

• 1.
• 2. ^{"The National Archives UK - WORK 25-208" by The National Archives UK - Flickr: The Fifties in 3D. Licensed under OGL via Wikimedia Commons - http://commons.wikimedia.org/wiki/File:The_National_Archives_UK_-_WORK_25-208.jpg#/media/File:The_National_Archives_UK_-_WORK_25-208.jpg}

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 Surprised?

3D films have existed in some form since 1915, but had been largely relegated to a niche in the motion picture industry because of the costly hardware and processes required to produce and display a 3D film, and the lack of a standardized format for all segments of the entertainment business.

^{http://en.wikipedia.org/wiki/3D_film http://en.wikipedia.org/wiki/Wikipedia:Text_of_Creative_Commons_Attribution-ShareAlike_3.0_Unported_License}