If you live with cats (because one does not simply own a cat), then this won't come as a surprise to you. Archaeologists have found paw prints in a Roman roof tile that's about 2,000 years old, proving that cats have never really cared about what gets in their way. In ancient Rome, roof tiles were made of wet clay, left to dry in the sun. Researchers believe that's when one curious kitty stomped across the tile, leaving its imprint on history.
This one is my absolute favorite. How many times have you been working on your computer, when your cat walked right across your keyboard? It's nice to know some things never change.