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Knowledge

Facts, science and history of optical illusions.
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Prehistoric ambiguous illusion

The history of optical illusions in art

Forced perspective image Pisa tower

Forced Perspective

Can animals see optical illusions? Hosico cat shows it with optical illusion rug

Animals and optical illusions

Phoenix rising

This is the volcano Mount Etna in Sicily erupting. The bright lava against an almost invisible mountain looks like a Phoenix (or Mutalisk)

Source/credit: honkay

This is the volcano Mount Etna in Sicily erupting. The bright lava against an almost invisible mountain looks like a Phoenix (or Mutalisk)

More optical illusions:

Cat defies gravity

Dogs sharing a mouth

Unsuspecting Amputee

Impossible woodwork

Find the black car

Assorted Dried Beans

Floor Color Creates Extra Dimension

Knot of snakes illusion by the atticus atlas moth.

Knot of snakes

Snakes

Cliff at great heights above a highway at Gulek Castle, Turkey.

Great heights

Landmarks