If you've been counting on your daily dose of merlot to stave off mortality, you might want to consider Plan B. The links between red wine and longevity aren't nearly as strong as they once seemed, according to new research in the journal Nature. In fact, the research calls into question the whole mechanism used to explain wine's power to extend life. Sorry, oenophiles. This all has to do with some natural proteins called sirtuins. (That's pronounced sir-TWO-ins in American English, in case you're reading this out loud at a bar.) Yeast carry a version. So do worms, mice and people.