 It is clear that for many philosophers, the topic of animal consciousness is no longer only of peripheral interest. There is increasing interest in animal cognition from a range of philosophical perspectives, including ethics, philosophy of mind, and the philosophy of science. Philosophers working in all of these areas are increasingly attentive to the particular details of scientific theory, methods, and results. Many scientists and philosophers believe that the groundwork has been laid for addressing at least some of the questions about animal consciousness in a philosophically sophisticated yet empirically tractable way. Yet there remain critics from both sides: on the one hand are those who still think that subjective phenomena are beyond the pale of scientific research, and on the other are those who think that science and philosophy have not moved far enough or fast enough to recognize animal consciousness. The arguments on both sides are by no means exhausted.