Memories are formed by the brain's ability to place events in the context of past events, present, and future events. Memories are not just about learning, but also about placing your entire life into a context. The process of memory formation involves different brain structures and neurochemicals. There are specific tools for enhancing learning and memory, such as novelty, repetition, association, and emotional resonance. Some memories can be formed very quickly, known as one trial learning, which is a survival adaptive mechanism. Emotionally salient events allow memories to get stamped in, and the brain has evolved to pay attention and remember certain things for survival.