Using stimulated Raman spectroscopy, researchers tuned lasers to the frequency of proteins in red blood cells. They trained the lasers on blood vessels in the ear of a mouse. A detector captured the resulting protein signals, translating them into images, which researchers sequenced together to create a video of red blood cells flowing through the capillaries of a mouse. The movie shows a Y-shaped junction of blood capillaries with individual red blood cells.
Technology Review reporter Lauren Cox tests the Zipcar app, which lets drivers find the nearest available car in 55 cities, on the iPhone. The mobile-phone app lets customers be more spontaneous about renting a vehicle for an hour or so.
Technology Review visits Ed Boyden, an assistant professor at the Media Lab and leader of the Synthetic Neurobiology Group at MIT, in his lab, where he demonstrates a device to turn neurons on and off and discusses how photosensitive proteins can be used to study and manipulate the workings on the brain.