Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The behavior of non-human animals has captivated human imagination from antiquity, and over the centuries many writers have speculated about the animal mind, or its absence. Animal cognition is the study of the mental capacities of animals, and has roots in comparative psychology, ethology, behavioral ecology, and evolutionary psychology. Learn more about the mental abilities of animals in the following pages.