Fig. 2.

Samples from the salamander tour in vision science. The timeline shows selected contributions of the salamander to vision research and can be roughly divided into a period centered on neuroanatomy (orange region), a period with focus on cellular neuroscience and neurochemistry (green), and a period with major contributions to systems and computational neuroscience (blue). The image on top shows an axolotl (photo kindly provided by Norma Kühn). The fuzzy-looking appendages at the neck are external gills, a typical feature of aquatic salamanders.