Donald Griffin was the first scientist to challenge the reductionist notion that animals are incapable of cognition (the word for thinking in non-human animals), in 1985, and he founded the science of cognitive ethology.
This book, and the earlier version released in 1994, provide a range of reports of eye-witness accounts of behaviour by animals that could not have been performed without mental referencing (or thought), along with his brilliant analyses and discussion of the meaning of each.
Though well received by the public, the works of Professor Griffin were widely criticized by the scientific community because his assertions were difficult to prove, and because his views represented a reversal of the currently held belief that animals were unconscious automatons. However, more and more evidence is appearing in the scientific literature in support of his pioneering work, and proving him to be right.
This book is unequalled in presenting a scientific argument that animals, invertebrates as well as the so-called "higher" animals, are capable, each in a unique way, of cognition. The latest version of the work includes arguments in response to criticisms of the original.