The genetic code is immensely complex and scientists continue to gain deeper and deeper understanding. A new field of study developed around the genome is epigenetics. Epigenetics, put simply, is the study of gene expression. This field of study shows that physical factors have the ability to make changes to the rate of expression of one's genes. It is thus important to know what these potentially dangerous activities, or factors, are and how they will affect the every day individual. Understanding epigenetics can be extremely useful in creating a healthier life.