the original illusions
Popular Science|Spring 2020
the original illusions
ILLUSIONS HAVE FASCINATED HUMANS FOR centuries. Before we fully understood the science of sensation and perception, philosophers like Aristotle simply observed the world— and picked up on some weird stuff. According to Vincent Hayward, who studies such phenomena at the Institute for Intelligent Systems and Robotics in Paris, these tricks occur when experience and context make you expect one feeling but perceive another due to abnormal circumstances. Here are three of Aristotle’s earliest observed illusions, explained by modern science.
JESS ROMEO

1/Waterfall illusion

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Spring 2020