These strikingly beautiful images of cells have been created using the technique of immunofluorescence microscopy. Dr Nancy Kedersha of ImmunoGen Inc. in Massachusetts, has been using immunofluorescence in the search for more effective anti-cancer drugs. One of the crucial aspects of this research is to identify molecules on the surface of tumour cells. By labelling antibodies to these molecules with a fluorescent dye, the outline of the cell can be revealed when viewed with light of an appropriate wavelength. The fascinating images in this set have been achieved by using a series of different fluorescent dyes and forming a composite image by multiple exposure. The extraordinary results would not look out of place on an art gallery wall.