An Optical Illusion is a type of visual illusion puzzle which is used for fun and challenge.  These types of illusions often ...

This optical illusion challenges readers to spot a hidden umbrella among numerous ostriches within 11 seconds.

TODAY is Quitters Day – the date when, statistically, most people officially give up on their New Year’s resolutions. To mark ...

Challenge your brain with this viral motion optical illusion that tests binocular vision and observation skills.

This image contains a horse which you need to spot within 15 seconds of viewing time. The problem presents itself as a ...

Optical illusions have gained a lot of popularity recently, as they get our brain to exercise, and can be the perfect test of ...

Optical illusions have gained a lot of popularity recently, as they get our brain to exercise, and can be the perfect test of ...

Note: Most subscribers have some, but not all, of the puzzles that correspond to the following set of solutions for their local newspaper. "The object of a new year is not that we should have a new ...

Abstract: We developed a low-refractive-index adhesive for silicon photonics. Filler size effects on insertion loss were examined; 100 nm fillers caused no degradation, but higher loading induced ...

Note: Most subscribers have some, but not all, of the puzzles that correspond to the following set of solutions for their local newspaper. SINCE THE MAN HAD GROWN WEARY OF DWELLING IN A MONASTERY FOR ...