It's been 100 years since RN started broadcasting, and over that century, it's been a powerful fixture in people's lives.But as the media landscape changes, is public radio being drowned out? Or is it more necessary than ever? We look at how public radio is evolving for the future.Plus, beachgoers live in terror of coming across a shark on a summer swim, but they might not deserve their bad reputation. We look at whether we need to be so scared of sharks.