Tune into Science Friday today on WSQX from 2-4pm and learn how in California, monitoring marine protected areas can get expensive. Current efforts—which include underwater surveys conducted by scuba diving volunteers—have already cost the state $16 million, and in some places, there’s no funding left. But testing DNA in water samples could provide an effective alternative to more costly methods. KQED’s science and environment reporter, Lauren Sommer, discusses this story and other science news from the week. Plus, when it comes to their diet, polar bears aren’t so finicky.