A brain-teasing "Spot the Difference" game challenges readers to find three changes between two seemingly identical pictures ...

Only the most attentive readers can find three differences between the newly-wed couple's pictures in 23 seconds! Can you?

The "spot the difference" game is a popular type of puzzle in which two similar-looking images will be placed side by side.

IQ tests, or Intelligence Quotient tests, assess a person's cognitive abilities and problem-solving skills. These tests evaluate an individual's mental functions such as logical reasoning, pattern ...

Children too young to know words like "impossible" and "improbable" nonetheless understand how possibility works, finds new work with two- and three-year-olds.