The new puzzle on Reddit has confused the users, as they wonder where the cat might be hidden. The challenge shared on ...

The photo shows dozens of translucent round beads glowing under a white ring light, each one catching rainbow reflections.

Test your observation skills with a train image challenge. Find three subtle differences within 12 seconds. This visual ...

Prior research has produced mixed results on the question of animals and their susceptibility to optical illusions, per the ...

Duping a guppy is easier than duping a ring dove — at least when it comes to a classic optical illusion.

Optical illusions come in many different forms, from the perplexing to the mind-melting, but op art doesn't always have to be headache-inducing. Representing the serene side of op art, Larry June's ...

Allen Institute researcher Jerome Lecoq points to one of the diagrams that was used in a study focusing on how the brain interprets optical illusions. (Allen Institute Photo / Erik Dinnel) Our brains ...