Do you ever wonder what your dreams mean? Have you ever wondered why we dream? Wondering what causes your dreams? Well, dreams are part of our daily routine. Many people dream every night. There are different types of dreams. However, the psychologist knows that people need sleep. Why? Because it's part of life and we need sleep to live. There is a dreamlike air that has intrigued many people over the years. What is a dream? A dream is a sequence or sensation, images or thoughts that pass through the minds of sleeping people. Dreams have been the subject of studies dating back to 4000 BC. In our dreams we can go anywhere, we can be anything, and we can be anyone. Your visions and ideas can also come from your dreams. In Roman and Greek times, dreams were viewed in a religious context and were believed to be messages from God or the dead. When you sleep you have a cycle of phases. The phase lasts approximately 90-120 minutes. The first phase is light sleep, muscle relaxation, lowering of body temperature, slow eye movement and slow heartbeat; this means it is preparing to put you in a deep sleep. In the second phase the body temperature continues to drop and the muscles relax, the immune system begins to work on the endocrine gland with the secretion of growth hormones. In the third phase still in the NREM phase. This means that the body temperature continues to drop and, by relaxing the muscles, metabolic levels are extremely slow. During stage four your eyes move back and forth as if you are looking at something under your eyelids – this is called REM sleep or delta sleep and occurs about 90-100 minutes into your sleep streak. Blood pressure increases and heart rate accelerates. Your mind is revitalizing… middle of paper… and will be everywhere during your dreams. There is a dreamlike air that has intrigued people for many years.Works CitedQuotes:1. "Dictionary of dreams". Glamor Girl September 19, 2010: 121.www.glamour.com. Network. March 1, 2011.2. Macgregor, Trish, and RobThe Everything Dream Book.Holbrook, MA: Adams, 1998. Print.3. "An online guide to dream interpretation". An online guide to dream interpretation. Np, 1 January 2000. Web. 8 April 2011..4. Angie, Choi. My Dreams: A Simple Guide to Dreams...San Fransico: Ingress Press, 2005. Print.5. Abadie, M.J. "The Power of Teen Dreams: Discover the Meaning..."www.google.books.com. Bindu Books, January 1, 2003. Web. April 8, 2011. < . books.google.come>