Thin brains

More on smoking: Smoking can thin the lining of the brain, which is already thinned by age. It can lead to cognitive problems and such, and they've found that the thinning takes place (for smokers) right in the part of the brain that deals with addictions.

"The orbitofrontal cortex has frequently been implicated in drug addiction. The current findings suggest that smoking-related cortical thinning may increase the risk for addictions, including smoking." All addictions? So if you have a thinner lining of your brain, are you more prone to addictions in general? I would love to know.

The next study they say they're going to do is look at whether quitting smoking repairs the lining. Now that would be nice.