The gene-editing technique known as CRISPR accelerated biological and medical research in the last decade by allowing scientists to repair the DNA of human cells almost as simply as using a pair of scissors. Gene-editing?"and especially CRISPR, because it's easy to use?"has given researchers hope for curing genetic diseases, including cancer. Now, a team of researchers at Case Western Reserve University has developed a method that could make CRISPR methods even more precise?"and more promising.