Test your observation skills with this optical illusion challenge! Spot the hidden owl in a pattern of birch trees.

Background and Aim: Common endoscopic findings in stomachs with Helicobacter pylori infections include antral nodularity, thickened gastric folds, and visible submucosal vessels. These findings ...

Optical illusions are incredible brain teasers that put your observation skills to the test and question your pattern recognition skills. In this thri ...

Experts believe that individuals with high fluid intelligence, the ability to think quickly and solve novel problems, excel in visual challenges like picture puzzles. Psychologists also link ...