You can measure a cow's mood by the temperature of its nose!
Imagine not being able to recognize faces. You could see faces, but you’d be entirely unable to distinguish one face from another. All faces would look more or less the same, with an amorphous assemblage of eyes, ears, noses, lips, and chins. To put it mildly, that would be strange. Learn more on this Moment of Science.
Does your mood effect your physical ability to fight the common cold? Find out on this Moment of Science.