‘To make a living room look bigger, you want to choose wallpapers that create the illusion of space. Lighter colours such as ...

Expand the image above to fill your screen and stare at the black blob in the center. (You can also find the original version here.) Most people perceive the blob as ...

A mind-boggling optical illusion can trick the brain into thinking a static black hole is expanding, researchers have shown. This 'expanding hole' illusion, which is new to science, has been ...

To be clear, there really are 12 black dots in the image. But (most) people can’t see all 12 dots at the same time, which is driving people nuts. “They think, ‘It’s an existential crisis ...