Chinese researcher He Jiankui of Shenzhen, along with US scientist and bioengineering professor Michael Deem, assisted in making the world’s first gene-edited babies. While this was not announced in a journal or peer reviewed as of yet, Jiankui asserts that he used a tool during the fertilized embryo stage of recently born twin girls. His goal was to offer them the ability to resist HIV infection by imparting a trait very few people have naturally. Many questions have arisen—beyond whether or not he succeeded—with is it justifiable or legal, being two of the foremost. Gene-editing on humans is currently illegal in the US. Read more about the fascinating, in-depth process at the Associated Press.