Joe Palca is a science correspondent for NPR. Since joining NPR in 1992, Palca has covered a range of science topics — everything from biomedical research to astronomy. He is currently focused on the eponymous series, "Joe's Big Idea." Stories in the series explore the minds and motivations of scientists and inventors. Palca is also the founder of NPR Scicommers – A science communication collective.
British police said 10 people have been hospitalized, nine with life-threatening injuries, following a mass stabbing attack on a London-bound train Saturday evening, and that counter-terrorism police are supporting the investigation.
President Trump on Saturday said he's ordered the Pentagon to plan for potential military action in Nigeria, where he alleges the government is failing to rein in the persecution of Christians.