A contraceptive drug helps human nerve cells regenerate by unlocking their forgotten embryonic healing abilities.

A new study suggests that subtle changes in the brain’s immune cells could help explain why some people remain mentally sharp despite Alzheimer’s pathology. For decades, Alzheimer’s research has focused on the buildup of amyloid plaques and tau tangles, the two hallmark features of the disease. Yet a puzzling reality has continued to challenge scientists: [...]

Scientists have uncovered an early brain mechanism that may help explain why people carrying the APOE4 gene face a higher risk of Alzheimer’s disease. For millions of people who carry the APOE4 gene, the strongest known genetic risk factor for Alzheimer’s disease, changes in brain activity may start years before memory problems become noticeable. Researchers [...]