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.
Historical Markers in the US are fascinating, sometimes wrong, sometimes offensive and cruel. But they also have the power to unlock secrets, like those of a long forgotten Civil Rights cold case.
NPR's Ayesha Rascoe speaks with Sarah Ludington of Duke University's School of Law about the first amendment protections for students who are protesting on college campuses.