Scientists have long known that light can sometimes appear to exit a material before entering it – an effect dismissed as an ...

Delving into optical illusions that challenge you to spot elusive ... scanning the image for sneaky clues and embracing the ...

Remember the famous optical illusion Rubin’s vase? If you look only at the positive space, you see a vase. But if you isolate the negative space, you perceive two faces in profile — a visually ...

Negative space between the roof and floor, and between the floor, terrace and ground, creates the illusion that the building is floating. Inside a central core containing the bathroom, kitchen and ...