National Science Health & Safety Big Leaps In Gene Editing Raise Ethical Questions About Human Application 8:34am December 24, 2016 News U.S. Research News Science Health Humans Mental Health Animals Share URL copied to clipboard! Copyright 2016 NPR. To see more, visit http://www.npr.org/. 300x250 Ad More Weekend Edition Saturday World News Chileans weigh a new constitution by Scott Simon Sports Saturday sports: Serena Williams' dramatic U.S. Open by Tom Goldman 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate