In a First, Scientists Precisely Edit Human Embryo Genes

Carl Zimmer / nytimes - Researchers relied on a newer gene-editing technique that may make it possibl to engineer embryos, a prospect that has long alarmed bioethicists.

AI Summary: Researchers report the first precise edits to human embryo genes, demonstrating a technical milestone that immediately reopened the ethical and safety conversation about germline modification. Scientists urge caution, tighter oversight and more study before any clinical application while bioethicists debate whether we’ve crossed a line that’s been long teased in science fiction.