In an amusing experiment that tests feline persistence and perception, Japanese YouTuber Mugumogu asks, “If a cat’s head passes, the body also passes?” The test subjects are two cats of slightly different sizes: Hana and Maru. The surprisingly quiet test: A doorway with a homemade panel of rectangular cardboard gaps that get smaller and smaller.

At what point do they decide the passageway is too small to fit through? At what point is the hole actually too small? And what if the gap is round? Mugumogu tested that, too, in another fun-to-watch experiment:

Watch cats do more amusing cat things: “Sunflower Cat Window” – Eight cats in a time-lapse sunbeam, how Jun trained his cats to shake hands and ride a bike, and what do cats do all day?

Plus: How small of a space can a Northern Goshawk fly through?

via Boing Boing.