How many faces do you show to the world? Happy, sad, surprised, scared, mad, excited? Yes, all those and more. We know what a happy smile looks like on the faces of our friends and families, but do animals smile? Zoologists believe that an animal’s use of what we call a smile is no more than a collection of conditioned reflexes that move the muscles in the face. Smiles on animals’ faces perhaps are just misconception we have made.(Photo source: chinadaily.com.cn)

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