Ars Technica: It is a truth universally acknowledged—at least by those of the feline persuasion—that an empty box on the floor must be in want of a cat. Ditto for laundry baskets, suitcases, sinks, and even cat carriers (when not used as transport to the vet). This behavior is generally attributed to the fact that cats feel safer when squeezed into small spaces, but it might also be able to tell us something about feline visual perception. That’s the rationale behind a new study in the journal Applied Animal Behaviour Science with a colorful title: “If I fits I sits: A citizen science investigation into illusory contour susceptibility in domestic cats (