A natural wonder in North America has been playing tricks on the mind for thousands of years. And while it is commonly known ...

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Optical illusions have been proven to be a great brain exercise as it encourages problem solving skill and creative thinking while also helping us understand the way our brains and eyes work together.

The brain cannot fathom how an optical illusion can manifest in real life, rendering it "impossible". Photograph courtesy Meiji University Take for instance the illustration of two L-shaped blocks.