According to the team, the next-gen CRISPR is more precise and more efficient. Plus, it has the potential to prevent genes from repairing themselves.

Lead scientist David Edgell explains:

"The problem with CRISPR is that it will cut DNA, but then DNA-repair will take that cut and stick it back together. That means it is regenerating the site that the CRISPR is trying to target, creating a futile cycle. The novelty of our addition, is that it stops that regeneration from happening."

See, the upgraded CRISPR cuts genes in two places instead of just one to make it tougher for self-repair to kick in. The team still has to confirm that through further testing, but as the team says, that "is the hope and the expectation." If you want to read the study's technical details, check out the team's paper in the Proceedings of the National Academy of Sciences.