In this optical illusion picture, a second man is hidden in plain sight. Are you one of the sharpest few who can spot the second man in 5 seconds? Test your observation skills now!
These puzzles and optical illusions have long fascinated people of all ages for centuries. More than an amusing time killer, they are a wonderful means to exercise the mind and sharpen the ...
Not all minds are wired the same. Some people can instantly recognize hidden details, while others get tricked by illusions. Optical illusions are fascinating—they test how quickly your brain ...
Located at the top of the heavily (tourist) trafficked Royal Mile, Camera Obscura is filled with enough colorful puzzles, games and optical illusions to keep the kids (and adults) entertained for ...
RECENT articles 1–3 in Nature have discussed the explanation of optical illusions and, in particular, Gregory's theory of constancy scaling. According to this theory, illusions are produced in ...