Science, in the media and in public discussion, means that anything that runs counter to the dominant myth of how science is done and how knowledge is generated is subject to public question at best, and more often harsh criticism or humor.
Want to live a long time? Who doesn't? Quite a number of smart people have staked their hopes for long life on restricting their calorie intake. It's an idea that rests on a not-inconsiderable body of evidence. But some new developments suggest it may be a questionable strategy.