According to CNN.com, "Chinese scientist He Jiankui announced to the world [on Youtube] that he successfully used the gene-editing tool CRISPR-Cas9 to modify the DNA of two embryos before birth, essentially creating the world's first genetically modified humans."
William Hurlbut, Senior Research Scholar at Standford University Medical Center's Department of Neurology, "I see it as one of those moments that happens once every few decades. Where someone does something that so dramatically changes the landscape that the world will never be the same again."