Psychology Says When You Instinctively Smile Back at a Total Stranger It Is Not Merely Politeness – Your Brain’s Mirror Neuron System Has Subconsciously Simulated Their Facial Expressions to Test Their Threat Level https://discoverwildscience.com/psychology-says-when-you-instinctively-smile-back-at-a-total-stranger-it-is-not-merely-politeness-your-brains-mirror-neuron-system-has-subconsciously-simulated-their-facial-expressions-to-test-their-t/?utm_source=dlvr.it&utm_content=topic%2Fscience&utm_medium=mastodon #MentalHealth