Super-resolution microscopes have revealed a whole new type of connection between neurons in mouse and human brains. In the lab, Johns Hopkins University neuroscientist Minhyeok Chang and colleagues identified tiny tubular bridges in the branching tips of cultured neurons. In further tests on mouse models of Alzheimer's disease, it appeared the bridges were shuttling calcium and disease-related molecules directly between cells. "[Similar] structures can transport a vast range of materials, from