They challenge you to find subtle differences between two identical pictures. These puzzles boost concentration and memory and provide an effective mental workout. You can solve these challenges ...

Spot the Difference puzzles test the memory and observation ability of an individual. These puzzles challenge you to find the variations between two very similar-looking images. This exercise is ...

“There is perhaps a natural tension between scholarly research and these huge global problems,” he explains, pointing to the pressures of publishing in journals with a narrow focus and readershi ...