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
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
Scrambled Text
Secret Words
The Hermann Grid
Titchener Circles
Twisted Squares
What Do you See?