Research from the University of Iowa shows that pigeons can discriminate abstract concepts of space and time, and seem to use a region of the brain different from humans and primates to do so. The finding adds to the growing recognition that lower-order animal species, such as birds, reptiles and fish, are capable of making high-level abstract decisions. “In fact, the cognitive skills of birds are now considered increasingly closer to that of human and non-human primates.”

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