Ever since it was published in 1892, the rabbit-duck illusion has been perplexing viewers with its remarkable ability to shapeshift. Does it show a rabbit and then a duck, a duck and then a rabbit, ...
This is the astonishing moment the centuries-old 'duck-rabbit' illusion was created in the sky by a flock of starlings over Scotland. Degs Brown caught the incredible formation on his mobile phone ...
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