Year in review: Breakthrough gene editor sparks ethics debate
Researchers use CRISPR to edit nonviable human embryos
CUT AND PASTE This year, the gene editing system CRISPR has opened the door to new scientific advancements — and ethical concerns.
Illustration created by Stephen Dixon and Feng Zhang
A revolutionary gene-editing technology made headlines this year as much for the ethical and societal issues it raised as for the scientific accomplishments it enabled.