The quest to learn if our brain’s mutations affect mental health

Are we on the brink of a breakthrough? For years scientists have tried to find a gene for conditions like schizophrenia, Alzheimer's and autism. But the real source could lie in a much more complex genetic puzzle. Roxanne Khamsi explores how scientists have always been looking to understand the biology of mental illness and how it could be reflected in all of a person's cells. But, a new study suggests that it could be the genetic differences between cells. Here she contemplates whether the once far-fetched explanation has started to be taken seriously by researchers.