Sci is at Neurotic Physiology today, talking about an interesting new study. There's one gene that, when you knock it out, produces obese mice. There's another that, when you knock it out, produced overgrooming mice, a model of OCD. When you knock BOTH the genes out, what do you get? And overgrooming obese mouse? NO. Head over and check it out.
The views expressed are those of the author(s) and are not necessarily those of Scientific American.