How do babies learn facial expressions?

Before babies learn how to talk, they learn how to absorb emotions and understand what you are trying to say because of your tone of voice. Babies learn from what they see others do. They love to see their parents facial expressions and will use them as their role models. They go from only absorbing the different vibes around them to actually interpenetrating what they feel through facial expressions. Apart from learning from their parents, babies are born with a natural instinct that tells them to smile when they are happy and frown when they are sad. For the most part, humans are born with common sense to let our emotions be read through our facial expressions.