Journal club. A genomic systems biologist muses on how shared DNA mistakes reveal shared cellular ancestry

The way an organism or cancer develops often depends on how cells relate to each other. This is because ancestral cells make molecular decisions that affect the regulation of genes in their offspring. Revealing complex lineage relationships usually requires sophisticated methods of molecular embryology that are available for only a few 'model' species and not for humans. I recently stumbled upon a string of creative papers from two competing labs that prepare the ground for change