In research of the obvious, John Bradshaw, an anthrozoologist at Bristol University and author of “Cat Sense: How the New Feline Science Can Make You a Better Friend to Your Pet,” has discovered that cats can hold grudges.

Of course, any cat owner can tell you that if you don’t do what it wants, it will hold a grudge for months or even years. Just try taking away your cat’s favorite toy or forget to give it its dinner and you’ll discover that cats can hold grudges without using science at all.

To learn more about how cats can hold grudges, click here.