The word biopsy is usually associated with the idea of a surgical procedure intended to remove a piece of tissue suspected of being diseased or malignant, and in fact, that’s usually what it is. A research team at Queensland University of Technology in Australia is changing this with the development of liquid biopsies—a non-invasive method that analyzes blood and saliva for the early detection of cancer, cancer staging, and prediction of how a patient will respond to treatment. I