Knowledge

Facts, science and history of optical illusions.
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Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Inferior and Superior Mirages, and Fata Morgana

Misbehaving Shadow

Source/credit: 蓮

The shadow is an illusion created by a black cat stretched out in front of the white cat. Black cats are famously hard to photograph. For this reason they are called ‘voids’ online. This black cat looks like the shadow of the white cat, except that the shapes are not aligning.