This is an area of research with huge potential impacts that I had little understanding of. The basic explanations are pretty good, though I still have plenty of questions. Why are CRISPR RNA sequences palindromic? Etc. Mostly this is the stories of the people, though. Somehow I hadn't heard that there are genetically modified humans walking the earth, and how that happened is pretty interesting. Also these researchers managed to agree on some guard rails to safeguard our species, which has parallels with what is happening with artificial intelligence now.