Can you trust the headlines in your newspaper? What can you actually learn from reading message boards and random Facebook forwards? If you aren't sure what to believe, this guide by Gabrielle Rabinowitz and Emily Dennis can help. It describes how to track "digested" information back to an original, scientific source, the questions to ask, and the red flags to for — all of which will help you sort bunk from stuff that's actually worth talking to your friends about. The problem, of course, is that this can be a lot of work. Essentially, they're describing a lot of what journalists do when we're writing a story about a scientific topic.