A house cat’s bizarre antics may be more than just feline folly. The kitty may be seeing things that human eyes can’t.

Unlike humans, many animals see in ultraviolet, and a study now suggests that cats, dogs and other mammals can, too. Knowing these animals see things invisible to humans could shed some light on the animals’ behavior, the researchers say.

“Nobody ever thought these animals could see in ultraviolet, but in fact, they do,” said study leader Ron Douglas, a biologist at City University London, in England.

via Cats and Dogs May See in Ultraviolet | LiveScience.