Who published it?
Checking it the publisher of a study can sometimes help you ascertain its value. While Brown notes that a journal’s ranking isn’t a perfect indicator of its trustworthiness, it’s a start. He does note that some highly ranked journals, like Nature, an open-source subsidiary of which published the universe-expansion piece noted above, and Science are sometimes, in his opinion, seduced by the lure of an attention-grabbing headline.
Brown points out that some journals accept papers without peer review or other critiquing process altogether — meaning they’re just taking the authors’ word on a study’s veracity. University of Colorado librarian Jeffrey Beall had been hosting a well-known list of predatory publishers a skeptical reader could consult. It was mentioned in a recent New York Times article, though his site is offline as of this writing; maybe it will return.