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Optical illusions are created by modifying images in such a way that they trick our visual system into believing what it is seeing is real. These illusions have been around for centuries and are also ...

Ready to see how sharp your eyes really are? If so, this latest brain-teasing challenge is sure to put your observation skills to the ultimate test. This clever makeshift puzzle - featuring a nearly ...

The Best Illusion of the Year contest offers researchers, and participants, an opportunity to explore the gaps and limits of human perception. By Katrina Miller Take a look at this video of a waiting ...

Everyone loves an optical illusion — even if they leave us completely stumped — and they're all around us in the natural world. From an underwater waterfall in the Indian Ocean to a surrealist scene ...