Researchers from the University of Copenhagen (Denmark), led by the Spanish researcher Guillermo Montoya, have discovered how Cpf1, a new molecular scissors, unzips and cleaves DNA. This member of the CRISPR-Cas family displays high accuracy, and is capable of acting like a GPS in order to identify its destination within the intricate map of the genome. The high precision of Cpf1 will improve the use of this type of technology in repairing genetic damage and in other medical and biotechnological applications.