![LINNAEUS makes it possible to trace the origin of each cell of a zebrafish](/system/files/styles/mdc_list_teaser_mdc_mobile_1_5x/private/2018-04/Zelle_Zebrafisch_LINNAEUS.jpg?h=e7c76a65&itok=6YNk8_8W)
Developmental scars
The MDC researcher Jan Philipp Junker and his team have used CRISPR-Cas9 genome editing to pioneer a technique capable of determining both the type and origin of all the cells in an organism. They describe their method in Nature Biotechnology.