A study analyzing online news consumption found that negative words in news headlines increase click-through rates, while positive words decrease them. The study used a large dataset of viral news stories from Upworthy.com and employed randomized controlled trials to estimate the effect of negative and positive words on news consumption. The results suggest that humans preferentially attend to negative stimuli, which may be due to negative information being more 'sticky' in our brains. This tendency can drive online news consumption and engagement.