 The Science Behind Fear. Welcome to the first video in our series about fear. Fear is an emotion that has been essential to human survival. But what exactly is fear, and how does it work? Well, when we perceive a threat, our brain signals our body to prepare for a potential danger. This response is automatic, causing physical changes like a faster heartbeat or the sensation of butterflies in your stomach. Tune into our next video to learn more about the different types of fear and how they can impact your daily life. Remember, understanding fear is the first step towards conquering it.