...: Dolphins use sonar to hunt fish; they make different sounds and different decisions simultaneously. Dolphin Sound production Sonar Terminal buzz Victory squeal Fish capture Camera Brain Cortex Laterality Dolphins ( Tursiops truncatus ) find food using sonar. As they hunt for fish...

... to perform matched tests to compare the ways fish and humans scan stationary visual scenes. In humans, visual search is seen as a doorway to cortical mechanisms of how attention is allocated. Fish lack a cortex and we therefore wondered whether archerfish would differ from humans in how they scan...

... of the same types to form separate representations. © 1989 by Company of Biologists 1989 cortex thalamus areas nuclei Determining how sensory-perceptual systems evolved is a difficult process. Since little can be determined from the fossil record other than brain sizes...