How this trippy illusion will make you see an ‘expanding black hole’

This illusion of an expanding hole can trick your brain into thinking you are going into a cave or tunnel. (Image credit: Frontiers in Human Neuroscience)

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A brand new optical illusion tricks the majority of people into believing that a dark “black hole” area in the center of a stationary image is rapidly expanding as if the viewer is moving toward it. Researchers now suspect that the image literally fools the brain into believing that the viewer is moving into a dark space, such as a cave or tunnel.

The illusion consists of a large black ellipse surrounded by a dark halo on a white background filled with smaller black ellipses. Typically, when a person stares at the image, the dark elliptical area appears to expand outward for a few seconds, giving the design the nickname “expansion hole”. How this trippy illusion will make you see an ‘expanding black hole’

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