I think cats notice a lot more than we do. They’re very attuned to subtle changes—tiny vibrations, a shift in the air, even a shadow that moves a fraction of a second. It’s like they’re constantly listening to a quiet soundtrack we can’t hear, so when they stare at nothing, they’re probably listening to something far beyond our perception. It's a little eerie, but also oddly comforting, knowing there's a world of subtlety all around us.