An international team of researchers has found a new photoreceptor type in the eyes of deep-sea pearlsides, which have an unusual visual system adapted for twilight conditions. The research appears in the journal Science Advances. Maurolicus muelleri (top) and Maurolicus mucronatus (bottom). Image credit: Fanny de Busserolles, University of Queensland. Most vertebrate animals — including humans — have a duplex retina comprising two photoreceptor...
