The internet is chock full of photos of cats sitting in boxes, but why do they seem to love the confinement of a box so much? Researchers say the explanation is actually quite simple: cats like to squeeze into small spaces as it makes them feel secure and safe. Wide open spaces make the animals feel vulnerable and exposed, so a box is the perfect place to hunker down for an afternoon nap. In some experiments, cats have even responded to a taped-in square on the ground, treating it as they would a three-dimensional box. It's thought this virtual box may provide a sense of security and psychosomatic comfort. Another study even found cats with boxes adapted to new environments more quickly. So if you're adopting a cat you may want to leave some boxes around for your new friend.