national academy of sciences

  • Should we edit . Illustration by Getty Images
    February 3, 2016  

    When women have defective mitochondria, their children can inherit terrible, sometimes fatal problems. A new technology, pioneered in England, adds healthy cellular structure from a third person, meaning that children are born with DNA from three people. William Brangham learns more from Jeffrey Kahn of Johns Hopkins University and Marcy Darnovsky of the Center for Genetics and Society. Continue reading

  • May 2, 2012  

    For the first time, new national educational standards for grades K-12 will link global warming trends to manmade emissions. Part of our Coping With Climate Change series, Hari Sreenivasan looks at the challenges teachers face when covering the topic of climate science in their classrooms. Continue reading

  • July 9, 2008  

    Leaders of the Group of Eight nations agreed Tuesday to cut greenhouse gas emissions in half by 2050. But on Wednesday, a group of five emerging economies refused to sign the deal, saying they want more aggressive emissions cuts. A reporter examines the story. Continue reading