Petri-dish form of Alzheimer's aids drug testing

For the first time, and to the astonishment of many of their colleagues, researchers created what they call Alzheimer's in a Dish: a petri dish with human brain cells that develop the telltale structures of Alzheimer's disease. In doing so, they resolved a long-standing problem of how to study Alzheimer's and search for drugs to treat it. The best they had until now were mice that developed an imperfect form of the disease.