Our brains can do amazing things—but in the right circumstances, they can also fool us. Try the brain tricks and teasers below and find out what’s going on in the brain in each one.

Title
Adelson’s Same Color Illusion
Convex or Concave?
Curve Blind
Double Talk
Expanding Black Hole Illusion
Hidden Animals
Impossible Objects
In Depth
Long and Short
Missing Letters
Motion Ambiguity
Never-ending Scales
Ninio’s Extinction Illusion
Rainbow Illusion
Reversed Face Illusion
Rotating Snakes Illusion
Scrambled Text
Secret Words
Spinning Optical Illusion
Spinning Vortex Illusion
The Hermann Grid
The Shifting Spiral Effect
The Spinning Circles Illusion
Titchener Circles
Twisted Squares
What color is the circle?
What Do you See?