Remember a few years back, when it seemed everyone was excited -- or terrified -- about the "internet of things"? Tonight, Ben, Matt, and Noel are diving deep into the next step: swarms of tiny, interconnected sensors collectively called 'smart dust'. Predicted by science fiction writers decades ago, his technology can have thousands of applications, and can likely save lives in the future. Yet along with all this potential for good, these pervasive monitoring systems also raise serious concerns about safety, privacy, and autonomy. Tune in to learn the Stuff They Don't Want You To Know about smart dust.