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Knowledge Cats Dirty Minds
Buildings Physics behind them Shadows

Knowledge

Facts, science and history of optical illusions.
See all the articles or scroll down to see what you came for.

Superior mirages

Inferior and Superior Mirages, and Fata Morgana

Parallax effect

Parallax Effect

Expanding Black Hole Illusion

Mind-blowing facts about optical illusions

Knot of snakes

Knot of snakes illusion by the atticus atlas moth.

Source/credit: Lazaycopetant

This is knot of snakes is actually several moths (Attacus Atlas) sitting together. The tips of the wings of this moth look like snake heads to confuse preditors. 

Attacus Atlas

More optical illusions:

Raw Chicken
Misbehaving Shadow
Cat Head
Footprint in the sand
Cat defies gravity
Collage illusion of ship
Water drop
Tree Mural
  • Pareidolia
  • Physical illusions
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Just a door in the middle of a beautiful scene, makes the background look like a giant wall with a live wallpaper.

Live Wallpaper

Buildings

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

Phoenix rising

Nature