Last May, global public health officials were convinced that the Ebola outbreak in West Africa was under control. But by the fall, the disease had run rampant in Guinea, Liberia and Sierra Leone. How did it become the worse Ebola epidemic the world has ever seen right under the noses of unsuspecting public health agencies? Bill Nigut gets answers from New York Times investigative reporter Kevin Sack, part of the team of Times journalists who tracked down this cautionary tale of a deadly virus for a special New York Times report “How Ebola Roared Back.”

NASA has just released a list of 8 new planets outside our solar system that the Kepler space telescope has identified as having “earth-like” conditions. Could any of them contain life or are we alone in the universe? Bill talks with Georgia State University astronomer Rachel Kuzio De Naray about what the NASA discoveries may mean.