We all hear a lot these days on DNA testing and the human genome. Most of us can picture DNA as a double helix with rungs like a ladder. These rungs are the instructions that DNA brings to bear. Now we are beginning to hear more about another layer on top of our genome called the epigenome. What is this layer? How can it be visualized? How does it affect our genome? This important video shows how the epigenome interacts with our genome much like software interacting with hardware on modern computers.