Is it possible to know exactly how memory works in humans and other intelligent animals? Some people believe that it never will be. But some scientists, who are studying the function of the brain and its relationship to memory, do not share this view. It is now well known that memory, like other brain functions, is located in specific parts of the brain in humans. These parts may be identified and their location in the brain may be established. They work together in both short-term and long-term memory. Although scientists have not yet fully studied the brain, much progress has been made. One day the mind will be described fully both in biological and mental terms. Some people claim that they can recall things which happened many years ago. Have you ever had the same experience? The fact is, these long-term memories are very accurate in detail and can be compared to a movie in the brain. Once we start the movie going, we experience the entire memory. This movie in the mind or brain is the reason why we have a sense of self. We know who we are and we know that we exist.