![US News | Science Discoveries show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/031/093/small/us-news-science-discoveries.png)
Summary: MIT and University of Rochester researchers report important advances toward a therapeutic device that has the potential to capture cells as they flow through the blood stream and to treat them. Among other applications, such a device could zap cancer cells spreading to other tissues.