Optical illusions and visual puzzles are all the rage these days due to their ability to enthrall social media users. These brain teasers improve cognitive functions and are a fun way to pass the time ...

Brainteasers are more than just fun puzzles. They push the brain to think faster, notice small details, and make quick decisions. That is why optical illusions and logic tests have become so popular ...

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 ...