A new low-cost, paper-based method of disease detection could lead to earlier diagnoses and treatments, and could be particularly beneficial to people living in undeveloped, rural areas. The test could detect cancer from a urine sample within minutes, as well as a host of other diseases. The method works in conjunction with nanoparticles coated with peptides that trigger tumor proteins to release biomarkers, which can be easily detected in the patient's urine. However, the...