Human beings age and have done so since the beginning of time, but it remains an unsolved mystery. This enigma remained in the dark until recent technological innovations shed light on this elusive topic; Cells are key to understanding why humans age. Aging appears to be a relatively simple process, but the more you study it, it becomes apparent that it is quite 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 often made that contribute to the pool of knowledge. Perhaps over time, thanks to research on this topic, human lifespan will be lengthened and diseases that often afflict the elderly can be prevented or mitigated to a greater extent. Furthermore, it is proven that human aging is closely linked to diseases such as cancer, which is why so many world-class scientists are working on this topic. Interestingly, there is no universal theory that is widely accepted by the scientific community; however, there are many theories that credibly explain the science behind aging. Aging is a topic that should be studied 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 develop their knowledge and develop the theories on which they are based. For example, the discovery of telomeres represented a huge breakthrough in this field. Telomeres are protective structures at the ends of DNA strands. These structures gradually shorten to the point where... the central part of the paper...y is intended to do so. Other theories such as the free radical theory have more scientific evidence. Molecule produced by the digestive system, originating specifically in the mitochondria [Nelson, Nathan C. Nelson Department of Physics, Ohio State University]. These rogue radical molecules can destroy healthy cells, contributing to the death of the entire organism. There are some older theories that go back further, such as the “Error and Repair Theory,” [Dr. Leslie Orgel, Salk Institute], who theorizes that too many deoxyribonucleic acid errors are produced through the process of cell division for the organism to continue carrying out all vital processes. Aging is a topic worth exploring, especially with the baby boomer generation in mind. gets old. It is important that medical technology is able to keep up with the needs of the aging population.