“Peer-review is based on trust, but as the international scientific community grows, scientists won’t spend their careers in the small, trusted networks of known colleagues that earlier generations of researchers were used to. Journals and reviewers need to step up their efforts to check for misconduct, but inevitably, papers with major problems will get through. Crowd-sourced, post-publication review through social media is an effective, publicly open way for science to stay trustworthy.”