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The Secret Life of the Brain
History of the Brain 3-D Brain Anatomy Mind Illusions Scanning the Brain The Episodes:

Mind Illusions
Movement Color Angles Form
Angles Study

The lengths of these lines are distorted because of the angles attached to the ends. In general, the more obtuse the angle, the longer the lines appear. This illusion is called the Muller-Lyer illusion.
Scientists are still confounded by the wonder of geometric illusions.




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