Science Health & Safety New Guidelines Reflect Knowledge On Positives, Risks Of Mammograms 5:36pm October 20, 2015 health care Research News Science Health Medical Treatments Humans Share URL copied to clipboard! Copyright 2015 NPR. To see more, visit http://www.npr.org/. 300x250 Ad More All Things Considered World News Hamas release first 3 hostages under Gaza ceasefire deal by Scott Detrow Economy President-elect Donald Trump's meme coin earns billions overnight by Scott Detrow 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate