2-Photon Microscopy (IMAGE) University of Gothenburg Caption This is skin photographed in the two-photon microscope, showing epidermal cells and the collagen present in the dermis. Credit Photo: Carl Simonsson Usage Restrictions Images that may be freely reproduced when reporting about Carl Simonsson’s research may be downloaded from the university image archive. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.