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Knowledge

Facts, science and history of optical illusions.
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Squirrel Stereogram

Stereograms

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Forced perspective image Pisa tower

Forced Perspective

The Invasion

Street in Macau

Source/credit: Paul Tsui and National Geographic

This picture was entered into National Geographic travel photo competition by Paul Tsui. It depicts a real scene of Macau, with the Grand Lisboa Hotel looming in the background. 

More optical illusions:

Big bottoms
Mind-boggling Floor
Bent over the desk
Swamp monster
Larger than life
Live Wallpaper
Wireless Bird
Giant Broccoli
  • Pareidolia
  • Physical illusions
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Zombies attack

Zombie Attack

Zombies

Find the cat

Cat a log

Cats