This one freaks a lot of people out. Every time you switch from looking at the red dot to the yellow, or vice versa, both wheels start spinning in the opposite direction. The illusion exploits differences in the way we interpret motion in the center of the visual...

This looks like two photos of the same road, taken from different angles. But it’s actually just the same photo twice. Apparently, the visual system treats the image as if it were a single photo of two separate roads. The outlines of the two roads are parallel to one...