Detecting serious illnesses early can be difficult and often requires many tests. To solve this, researchers at Stanford created SleepFM, an AI that predicts over 100 diseases using data from just one night of sleep. By analysing brain waves and heart signals, the model can spot risks for cancer, dementia, and heart attacks with high accuracy. This benefits people by providing a simple, non-invasive way to find hidden health problems early, potentially saving lives before symptoms even appear.