World News Tour Rio De Janeiro's Oldest Slave Port With This New App 4:28pm July 18, 2017 by Catherine Osborn Technology World Latin America Digital Life History Share URL copied to clipboard! Copyright 2017 NPR. To see more, visit http://www.npr.org/. 300x250 Ad More All Things Considered Arts 'Notes to John' completes late author Joan Didion's trilogy on grief by Scott Detrow World News The eve of Canada's consequential election by Scott Detrow 300x250 Ad Support quality journalism, like the story above, with your gift right now. Donate