An Explosive New Report Could Upend More than a Decade of Alzheimer’s Research. How Did This Happen?

More than 15 years ago, researchers at the University of Minnesota announced they had made a breakthrough: When they purified a protein from the brains of genetically modified mice and injected it into rats, it would cause the rats to develop symptoms similar to Alzheimer’s disease in humans—the first time anyone had directly linked a […]