During ten years I have shared everything I know about painting and modelling in this blog. Today, I would like to share something else: what I know about mitochondrial DNA. Painting and modelling are two of my major hobbies. But another one is science. In the last four years I have developed a research project in the field of molecular biology, addressing how animal mitochondria produce new copies of mitochondrial DNA (see below). Yesterday, I had my doctoral dissertation or Ph.D defence.