One of the most enjoyable things about optical illusions is the after-effect . . . the moment when you and whoever else you've done it with let out a collective, "ohhhh." If you think this experience ...
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Optical illusion: Think you have sharp eyesight? Spot the hidden toothbrush in this kids' room in under 5 seconds!
Optical illusions have recently sent the internet into a tizzy, as they get our brain to exercise, and can be the perfect test of our observational skills and keen eye. They are also super fun to ...
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