Many cat owners will report that their feline companions like to curl up within small boxes. New research has found that not only will cats sit within a two-dimensional outlines of a square box on the floor — but they will also sit inside an optical illusion that merely looks like a square.

You can read more about the "If I fits I sits" research here which includes a video of a cat attacking an illusion of rotating snakes. Fun, right?

For our featured video of the week, David Grimm discusses how cats rival dogs on many social science and behavioral tests. But is anyone brave enough to study them?