I consider myself fortunate to be in good health, but a new discovery brings hope to those who aren't so lucky.
A method called CRISPR is currently used by scientists to edit genes in animal embryos. It relies on molecules too big to use in human cells. Now researchers have found a way of making the technique work using smaller molecules, opening the door for treating human genetic diseases with CRISPR.
This has the potential to improve thousands of lives, but I'm uncertain about how it will be used - just how far could editing human DNA go?