When most people think of mummies, they think of a single body wrapped up and buried. So when Egyptians buried mummified cats, the natural assumption was that each cat mummy represented a single cat.
Yet archeologists using a medical scanner discovered that one cat mummy actually consisted of bones from several different cats. Archeologists believe this might be another way Egyptians mummified their cats to preserve multiple felines for a future afterlife.
This just goes to prove that you can never be certain of anything involving cats. Maybe archeologists will one day discover that human mummies include cat bones as well.