Scientists have many tools at their disposal for looking at preserved tissue under a microscope in incredible detail, or peering into the living body at lower resolution. What they haven’t had is a way to do both: create a three-dimensional real-time image of individual cells or even molecules in a living animal.
Gold nanorods within the blood vessels of a mouse ear appear green. The lower right shows vessels within a tumor that lies under the skin.
Credit: de la Zerda lab