Optical Illusions

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	Count the black dots Are the horizontal lines parallel or not? This is not animated. To test this, stare at one spot for a couple seconds and everything will stop moving. How many legs does this elephant have? Focus on the black dot in the centre and move your head backwards and forwards. Keep staring at the black dot and the grey haze will appear to shrink Escher waterfall Which circle in the middle is bigger? Do you see gray areas in between the squares? Now where did they come from? Are the purple lines straight or bent? Is this possible?