image: Appearance model–generated average facial expressions of the five most expressive individuals (from a total sample of 20) tasting neutral, sweet and bitter solutions. The upper lip and nose areas are highlighted to show the action of the levator labii muscle (upper lip raise and nose wrinkle) across conditions. This image accompanied the report "In Bad Taste: Evidence for the Oral Origins of Moral Disgust," by H.A. Chapman et al appearing in the Feb. 27, 2009, issue of Science. view more
Credit: Image copyright Science/AAAS