[onetwotree]

CRISPR is a mechanism by which some species of bacteria and archea can edit a virus out of their genome -- it's essentially a small immune system. CRISPR is "hot" right now because of the potential to use it to edit arbitrary genomes. Bear in mind that the technique has a long way to go. It's more or less impossible to do it right now without causing a lot of side effects elsewhere in the genome.

As with most science, this has taken a long time and been the result of work by many, many scientists. Some scientists have big egos and are fighting about who the "real genius" is. Furthermore, it's widely thought that there's going to be a lot of money in this technique, if you can get a patent on it.

TL;DR; cool and potentially very useful science happened, now big egos, big greed, and people who would rather get rich and win a Nobel prize than share the discovery and its benefits with the world are having a fight about it.