Same here and while that's demonstrably not true (the explanation I heard was something about the colors and refresh rate so maybe this was true at some point in the past) the article does state the rats don't recognize themselves - that's different from recognizing the picture or being able to see it.

That said, it's really more of an art project than anything to do with science as the article makes it clear the rats were trained to push buttons to get sugar, the selfies were just artistic flourish to make a (fairly overt) point.