A.P. reports that researchers have found "a gene responsible for drunkenness in worms after plying thousands of the tiny creatures with booze, a discovery that could boost the fight against alcoholism." According to a brief in the Baltimore Sun, "the sober worms had the same mutated gene that appears to make them immune to alcohol's intoxicating effects."
Now, I'm no expert on worm genes, but it seems to me that the distinguishing feature of alcoholics is not that they become intoxicated when they driink, or that they like to drink, but that they tend to drink too much. If scientists really want to gain insights into alcohol abuse, they should study subjects whose consumption is demonstrably excessive–say, the worm at the bottom of the mezcal bottle.
[Thanks to Jeff Schaler for the link.]