Pinceton University asked the university's scientists and engineers to collect and submit images "produced in the course of research or incorporating tools and concepts from science." The resulting gallery is mind-boggling. Seen here, Purkinje Neurons by physicist Dmitry Sarkisov:
This is a composite image of five Purkinje neurons from the rat cerebellum, in the back of the brain. Each has been filled with fluorescent dye through a glass pipette, shown touching the cells. Images were taken on a two-photon microscope. Each Purkinje cell receives hundreds of thousands of inputs through its dendrite, the elaborate tree-like structure seen emerging from the cell body.
Link (via MAKE: Blog)