CARLOS CLARIVAN/SCIENCE PHOTO LIBRARY
A team has used CRISPR to make a record-breaking 13,200 changes to the DNA of a single human cell. The feat takes us a step closer to being able to thoroughly rewrite the genomes of our cells and other organisms.
Half of our genomes – the complete set of DNA inside our cells – consist of hundreds of thousands of copies of genetic parasites called transposons. These transposons code for genes that copy and paste themselves from one location in the genome to …