While gene editing offers the exciting potential for disease therapies, using it on human embryos opens up a can of worms.
New genetic technology could change the DNA of entire species to prevent them from spreading diseases.
Until more is understood, it's sensible to limit experimentation that would make changes to germ line cells that would be passed on to future generations.
Leading researchers have called for a ban on using a precise gene-editing technology on humans. How can CRISPR advance science and why is it raising concerns?
A naturally-occurring system discovered in bacteria holds promise as a way to fight pathogens – very specifically and without the risk of antibiotic resistance.