PRI's The World: 02/19/2016

January 2016 was the hottest January on record, but what do those high temperatures mean for the Arctic? We'll help you understand. Also, Marco Werman gets a violin lesson from some Iranian musicians — and almost manages to keep up with them. Almost. Plus, remember the Winter Olympics in Sochi, Russia, two years ago? The event is over, but one thing is still going on: An effort to rescue the city's stray dogs.