Worms don't wiggle when they have Alzheimer's disease. Yet something helped worms with the disease hold onto their wiggle in Professor Jessica Tanis's lab. While all the worms were grown on a diet of E. coli, it turns out that one strain of E. coli had higher levels of vitamin B12 than the other. "The worms we use all have exactly the same genetic background, they react to amyloid beta like humans do, and we can exactly control what they eat, so we can really get down to the molecular mechanisms at work." In the brains of humans with Alzheimer's,...