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

Cat defies gravity

Source/credit: pedroburon

This physical optical illusion is caused by a reflection. The cat is sitting on the left side of the glass door, while the box is placed on the right side of the door.
The reflection perfectly places the cat in the box.

More optical illusions:

Thats the cat's pajamas

Gmork

Firefall

Grumpy tree

Grate View of Central Park

Highway Loop

Inappropriately Dressed

Angel

If it fits…

Cats

Thats the cat’s pajamas