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Knowledge

Facts, science and history of optical illusions.
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Forced perspective image Pisa tower

Forced Perspective

Locomotives in their natural habitat

Pareidolia (Seeing faces)

Prehistoric ambiguous illusion

The history of optical illusions in art

Geometric Shapes

The Pyramid of Khafre

Source/credit: Giza 3D Survey

These geometric shapes are actually the Pyramid of Khafre at Giza seen from directly overhead.

More optical illusions:

Wind turbines
Disappearing trailer
Reflective bird
North Sentinel Tribesman
Floating Black Cat
Giant bullfrog
Freak of Nature
Bride Waterfall
  • Pareidolia
  • Physical illusions
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A slate patio

This Patio

Floors

Sloped floor

Mind-boggling Floor

Floors