A form of brain abnormality long regarded as permanent is, in fact, sometimes reversible, according to an unassuming little paper with big implications.
Here's the key data: some rats were given a lot of alcohol for four days (the "binge"), and then allowed to sober up for a week. Before, during and after their rodent Spring Break, they had brain scans. And these revealed something remarkable - the size of the rats' lateral ventricles increased during the binge, but later returned to normal.
