Are the tides changing for the North Atlantic right whales?

<p>This spring, scientists have documented 23 North Atlantic right whale calves born off the U.S. coast, the highest number since 2009. It's hopeful news for the critically endangered species, whose population has fallen to fewer than 400 in recent years. We speak with Amy Warren, the scientific program officer for the Anderson Cabot Center for Ocean Life who has been tracking the whales. </p><p><br></p>