Our brain is like a blank slate; the assumption was that you were born with a fresh set of genes and that whatever traumas or triumphs you experienced in your lifetime died with you. We now know the erasure process at conception is incomplete. You carry the lived experiences of your ancestors. This reveals the two layers of your biological makeup. The static double helix in the centre is your genotype. The fixed DNA you inherit, while the shifting command line code surrounding it is your phenotype. That is the software telling your body how to develop, behave, and survive. The bridge between these two systems is a field called epigenetics. Your environment and behaviours create chemical tags that attach directly to your DNA sequence. They act like volume knobs, turning specific genetic traits up to maximum sensitivity or silencing them completely ...