Inhalable nanosensors from the Bhatia Lab could enable earlier lung cancer detection. When the nanosensors encounter cancer-linked proteins in the lungs, they release a signal that can be detected in the urine with a paper test strip. The diagnostic, described in Science Advances, could make lung cancer screening more accessible in places where CT scans, the current gold standard for detecting lung cancer, are not widely available. This study was funded in part by Johnson & Johnson Lung Cancer Initiative. Additional related work was supported by Marble Center for Cancer Nanomedicine and the Koch Institute Frontier Research Program via Upstage Lung Cancer.