How does a camera work? no, a digital camera, I mean.  yeah... yeah.. optics. I know all about lenses. how does the plate at the back.. the one the photons hit.. how does it turn photons into electronic signals that turn into digital information? we're talking: CCDs,CMOS cameras, MKIDs, and superconducting bolometers! Dr. Danica Marsden and Dr. Suresh Sivanandam are here, and our guest today is award winning author Elizabeth Bear!