Researchers have made headway into understanding how the brain decides which side of a visual border is a foreground object and which is background. The research has sheds light on how areas of the ...

In the classic “Rubin’s vase” optical illusion, you can see either an elaborate, curvy vase or two faces, noses nearly touching. At any given moment, which scene you perceive depends on whether your ...

In the classic "Rubin's vase" optical illusion, you can see either an elaborate, curvy vase or two faces, noses nearly touching. At any given moment, which scene you perceive depends on whether your ...