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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

Is this a bird or a rabbit?

Ambiguous illusions

sorrowful rock face pareidolia

How do optical illusions work?

Floating either way

Boats floating in the bay

Source/credit: Arcadius Bear

The boats are floating on the water behind the celebration. The missing sky makes for a confusing perspective in this illusion.

More optical illusions:

110 pound squirrel

Long-haired Dog

Eyes of the Amazon

In Search for Water

The eye of the tower

Grate View of Central Park

Man playing with toy cars

Toy Cars

Cars

Giant Ship

Boats