The award for "best smile" goes to this Malayan tapir. Even though it looks ready for picture day, this tapir is not smiling at all. Instead, it's showing off a behavior called the flehmen response. Horses, hedgehogs, rhinos, tigers, and even our beloved house cats do it. Find out its function in our #TriviaTuesday Instagram story. #flehmen #sandiegozoo #bestsmileaward #animalbehaviors #thenoseknows