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

Animals and optical illusions

Inferior and Superior Mirages, and Fata Morgana

How do optical illusions work?

Joker Peeping over her Shoulder

Original Source: lost on the web

The creepy guy looking like a joker peeping over the shoulder of the girl on the right is just an illusion. When you look closely you can see that they eyes with heavy eyeliner are just the girl’s curls.

More optical illusions:

Aerial View of a Beach

Next to the boat

Best for Stairs

Venus Flytrap

a dirty mind

Shaven

a dirty mind