Dr Rink says researchers at Northwestern University have analyzed a link between casual use of marijuana and brain changes – and found that young adults who used cannabis even once or twice a week showed changes in brain structure. I, on the other hand, know that it has not had the slightest effect on my cognition ...what was I thinking about? Oh yes, Ukraine. Funny word that: Yookrain... You crane...Hey You Crane, watcha gonna do, whatcha gonna do when Putin come for you? Where was I? Oh yes. But enough about me.