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These lines are
parallel....aren't they? |
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The circles in these two
images are concentric not spiral........honest |
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Stare at the dot and the
grey surround will fade away |
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How many legs does this
elephant have |
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We can see a triangle that
isn't there |
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Stare at this image for 20
seconds, look away at a blank surface/wall - who do you see? |
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It's an up-and-down kind of
world |
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Young woman? or old man? |
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Which way round? |
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Rabbit or duck? |
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A stairway to nowhere |
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Young or old woman? |
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