Human beings have been aging since the dawn of time, but it remains an unsolved mystery. This enigma remained in the dark until recent technological innovations shed some light on this elusive subject; cells are the key to understanding why humans age. Aging appears to be a relatively simple process, but the more it is studied, the more it becomes clear that it is rather complex. There are myriad factors that contribute to aging, but none of them alone can answer the question of why humans age. This age-old question is at the forefront of medical research. As a result, discoveries are frequently made that contribute to an ever-growing reservoir of knowledge. Perhaps over time, through research on this topic, the human lifespan will lengthen and diseases that often strike the elderly can be prevented or controlled to a greater extent. Furthermore, there is evidence that human aging is closely linked to diseases such as cancer, which is why so many world-renowned scientists are studying this topic. Interestingly, there is no universal theory widely accepted by the scientific community; However, there are many theories that credibly explain the scientific basis of aging. Aging is a topic worth studying because it directly benefits many lives and produces tangible results. As medical and scientific equipment begins to evolve, many interesting discoveries have been made over decades of meticulous research. These discoveries allow scientists to build on their knowledge and develop their theories. For example, the discovery of telomeres was a monumental breakthrough in this field. Telomeres are protective structures located at the ends of DNA strands. These structures gradually shorten to a point where the middle of the paper ......y is supposed to do so. Other theories, such as free radicals, have more scientific evidence. Molecule produced by the digestive system, originating specifically from mitochondria [Nelson, Nathan C. Nelson Department of Physics, Ohio State University]. These unwanted free radical molecules can destroy healthy cells, contributing to the death of the entire organism. There are older theories that go back further, such as the “Error and Repair Theory,” [Dr. Leslie Orgel, Salk Institute], who theorizes that the process of cell division produces too many deoxyribonucleic acid errors for the organism to continue carrying out all life processes. Aging is a topic that deserves further exploration, especially as the baby boomer generation ages. It is important that medical technology is able to meet the demands of an aging population..