Adina Weinberger

Gait is not just a way to get from point A to point B. Each step, arm swing, and torso tilt is like a signature the body leaves in space. Doctors have long noticed that disease alters gait, but they considered it merely a symptom of a specific problem: if you limp, your leg hurts. Now it turns out that gait is a whole book about health, and you can read it with an ordinary camera.

An X-ray machine takes a scan, and the doctor sees only numbers — bone density, fat percentage. But the image holds far more. A team of researchers created a model called LeDXA that reads these scans like a map of hidden bodily signals. The model was trained on 11,540 scans from the Human Phenotype Project with no labels at all.