 In the half-lights, dusk and dawn, through the night when there's some moon around, that sort of thing. Clearly, now they live in our houses, they don't have to do that, but they have the eyes of their ancestors, which are large. They're almost as big as ours. An individual cat's eye is almost as big as a human eye, but it's obviously in a much, much bigger skull. A much smaller skull. Ours is in a bigger skull.