CRISPR gene editing has made its way into every corner of modern biology, but not into every corner of the cell. Although researchers have used these systems to develop treatments for sickle-cell anaemia and blood cancers, to unlock the secrets of multicellularity and to discover the role of thousands of overlooked proteins, there’s one place CRISPR can’t easily reach: mitochondria.Cancer cells get power boost by stealing mitochondria from nervesThe rings of DNA inside mitochondria are inaccessi...