Medievalist Emir O. Filipovic was flipping through fifteenth century manuscripts at the State Archives in Dubrovnik, Croatia — your average light reading — when he came across something rather remarkable on one of the pages: Feline paw prints.
"Has your cat ever walked across your keyboard?" asks Dr. Becker on his Facebook page, where the image has been shared thousands of times. "Well, it's not a new problem. Medieval book historian Erik Kwakkel recently Tweeted this photo of a 15th century book with... you guessed it... cat paw prints in ink on the pages! We're part of a long and glorious historical movement, friends."
As if you needed any additional proof that cats have always been assholes.