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Learn to draw a trippy optical illusion in 60 seconds
Optical illusions are fun to examine ... All you need is some graph paper, a pen and pencil – and some time to practice The ...
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32 optical illusions and why they trick your brain
Optical illusions play tricks on your brain ... supported by the University of Glasgow in Scotland. The rubber pencil illusion is a classroom classic. Pick up a pencil and shake it with your ...