Have a look at this image. Do you perceive that the central black hole is expanding, as if you’re moving into a dark environment, or falling into a hole? If so, you’re not alone: a new study shows ...
Delboeuf Illusion. The inner circle appears smaller when surrounded by a large circle than when surrounded by a small circle. Source: Drawing by Berit Brogaard When dentists drill holes in your teeth, ...
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