In this mind-bending puzzle, there are three numbers that are visible - 21, 22, and 23. But there is a third number in this ...

The peripheral drift illusion causes us to perceive motion in a still image. A new study shows that the mechanism of this illusion relies on changes in pupil size.

Today’s collection of mind-bending optical illusions and confusing-perspective photos is here to give your brain a workout.

We’re hopeful the next phase of tweaks to the downtown pilot project will address some of the problems driving the ...

Believe it or not, we've seen a few optical illusions in space over the year. Well, we haven't seen them – the Hubble ...

Earth crosses through Saturn’s “ring plane,” making the gas giant’s most iconic feature become nearly invisible ...

Find Saturn Rings To Disappear Latest News, Videos & Pictures on Saturn Rings To Disappear and see latest updates, news, information from NDTV.COM. Explore more on Saturn Rings To Disappear.

Fibre optics and optical communications is the use of thin strands of glass for sending information encoded into light over long distances. Total internal reflection prevents light inserted into ...

Optical imaging includes a variety of imaging techniques that rely on illumination light in the ultraviolet, visible and infrared regions of the electromagnetic spectrum. The term typically ...

Your time’s up! Spotted the pigs without hats yet? Or are you in need of some hints? For hints, all we can say is maybe try taking another good look! For this one, we can hardly give you any hint, or ...