Earlier this week, there was a ton of news coverage of a new World Health Organization (WHO) report concluding that processed meat is a carcinogen and that eating a couple of pieces of bacon a day will increase rates of certain types of cancer by 18%. The Guardian ran a story with the headline, “Processed meats rank alongside smoking as cancer causes – WHO,” and blogs like Medical Daily posted something called, “Red Meat Is Just As Likely To Give You Cancer As A Cigarette, The World Health Organization Says.”

Let’s consider these headlines a bit more carefully.

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Those of us who study natural reward systems, like those involved in feeding and drinking, are often welcome at parties of people who study drug addiction. For many drugs of abuse, a common way of thinking about how they work, at least at first, is by targeting these same reward systems, but bypassing the stuff that “naturally” activates them. So instead of getting a little activation of the system by eating a piece of chocolate, you get a big activation from cocaine.

For many drugs of abuse, this “bypassing” effect is more or less intuitive. Drugs like cocaine and heroin seem to bypass the normal route to particular systems in the brain, and go right to the source. The source, in this way of thinking, is a very important part of our normal systems. It didn’t evolve to respond to drugs. We don’t have a natural system for responding to these drugs. Instead, we have these systems so that we eat, drink, have sex…do the things that are necessary for our survival (as individuals and a species).

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A report from scientists trying to replicate lots of studies in psychology has shown a high rate of failure to replicate. This, unfortunately, has been used by people already skeptical of science, or of psychology, as confirming evidence that they were right: that science is all made up mumbo jumbo. Headlines like “Study delivers bleak verdict on validity of psychology experiment results” and opening sentences of articles that read “Don’t trust everything you read in the psychology literature. In fact, two thirds of it should probably be distrusted,” in news outlets that should know better, were all over. This response to the study, and the news of the study, is worth reading.

Oliver Sacks has died. 

http://www.nytimes.com/2015/08/31/science/oliver-sacks-dies-at-82-neurologist-and-author-explored-the-brains-quirks.html?smid=fb-nytimes&smtyp=cur&_r=0

This is a pretty good read for anybody thinking about (or in) a science graduate program. I agree with almost all of it, most of all, the last paragraph.