Have you ever heard of the 'cat mirror theory'? It's the idea that when cats see their reflections in a mirror that they don't recognize themselves and instead think they're looking at another cat.

See more of our trusted coverage when you search. Prefer Newsweek on Google to see more of our trusted coverage when you search. A cat recognizing a fellow feline's reflection has been dubbed as one ...

Add Yahoo as a preferred source to see more of our stories on Google. A lot of us start our day by looking at ourselves in the mirror while we fix our hair or brush our teeth. It's so much of a ...

Add Yahoo as a preferred source to see more of our stories on Google. Have you ever heard of the 'cat mirror theory'? It's the idea that when cats see their reflections in a mirror that they don't ...