HippocampusBrainbow hippocampus

Photomicrograph taken from a “Brainbow” transgenic mouse that enables to distinguish between neighboring neurons by illuminating them in different colors. This image shows part of the hippocampus, a brain region critical for learning and memory.

Photograph: Jean Livet (now Institut de la Vision, Paris), Jeff W. Lichtman et Joshua R. Sanes (Harvard University)