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Most of you might not know this, but 3-D glasses have actually been around ever since the 1920s, reaching their peak of popularity throughout the 1950s. They are still in use even today, although not as much as they used to be. 3-D glasses rely on a technique known as stereoscopic imaging, in which 2-dimensional images are combined in order to give the illusion of depth. For this however, binocular vision is required. Humans are among a handful of living beings on Earth to have binocular visi... Read »