His wardrobe is extensive and colourful, his face iconic, his presence strangely uplifting: he is Pepe, and he is a cartoon frog ... his extensive range of micro-emotion stickers made him a ...

From Captain Hook to Dick Dastardly and Cruella De Vil, their faces portray evil. Now scientists have worked out what scares us most about a cartoon ... convey negative emotions and we can pick ...