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Facts, science and history of optical illusions.
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Inferior and Superior Mirages, and Fata Morgana

Live Wallpaper

Source/credit: DIY Maxwell

Just a door in the middle of a beautiful scene, makes the background look like a giant wall with a live wallpaper. As you see in the image below, this was not the intention. This door is the entrance to an underwater observatory at Lake Zug in Switzerland.