text: People who use science to inform their decisions on matters such as cancer prevention, climate change, and food safety know about the hierarchy of reliability. There are "facts" in press releases, newspaper articles, and blog entries, which tend to be less trustworthy than, say, information in reports from Britain 's Royal Society or the U.S. National Institutes of Health. But if a report appears in a peer-reviewed journal, where articles are examined by independent experts before being published, it elicits instant and widespread respect all round.