Before revision:  In particular, we find that the news comment count follows a universal exponential distributionwhich is explained by the lack  of the otherwise omnipresent rich-get-richer mechanism . Exponential aging induces a universal dynamics of article impact.
After revision:  In particular, we find that the news comment count follows a universal exponential distributionwhich is explained by the lack of the otherwise omnipresent rich-get-richer mechanism in the analyzed data. The temporal dynamics of the news impact exhibits a universal exponential decay which allows us to collapse individual news trajectories into an elementary single curve. We also show how daily variations of user activity directly influence the dynamics of the article impact.