The bottom line is simple: articles that many people tweeted about were 11 times more likely to be highly cited than those who few people tweeted about. Its implications are even more interesting. It generally takes months and years for papers to be cited by other scientific publications. Thus, on the day an article comes out, it would seem to be difficult to tell whether it will have a real impact on a given field. However, because the majority of tweets about journal articles occur within the first two days of publication, we now have an early signal about which research is likely to be significant.