A half-inch chip that watches cancer cells divide — with no light at all

Brown University engineers built a half-inch (~1.3 cm) chip holding 1 million microscale electrodes that tracks cells via electrical capacitance — no lenses, light sources, or cell-damaging fluorescent dyes. Published in Lab on a Chip; lab tests tracked human breast cancer cells and cell division as it happened. Cheap to mass-produce and fully portable.