How Your Brain Perceives Magicians Cutting Their Assistants In Half
In recent years, Vebjørn Ekroll, Bilge Sayim, and Johan Wagemans have started to investigate a wide range of magic tricks, and their findings are revealing impenetrable perceptual illusions that are far more powerful than most magicians would expect. In this magic trick, the magician starts with one ball, held between two fingers, and we see that his hand is otherwise empty. Ekroll and his colleagues have suggested that when “viewed from this perspective, the spectators do not merely entertain the intellectual belief that the semi-spherical shell is a solid ball, but rather automatically and immediately perceive it as such because that is what their visual systems tell them to be the case.”
Source: gizmodo.com