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Facts, science and history of optical illusions.
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Mind-blowing facts about optical illusions

Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Dead Man’s Fingers

Source/credit: DrFetusRN

This fungus is named Xylaria polymorpha, but more commonly known as dead man’s fingers. This example is a perfect illusion, with 5 digits and more shaped like a hand than other specimens. It really looks like a zombie is going to rise up from the ground.