Maggie Starbard/NPR

Tyler Scorza, 7, had his tonsils removed last year to help with his snoring. We have the story on this week's podcast.

This week, as barely detectable levels of radiation from Japan's failing nuclear power complex reach California, our hosts discuss the health hazards posed by exposure to radiation.

NPR health correspondent Richard Knox, who has been following the story closely, says the risk is vanishingly low â€" and not only for Americans, an ocean away, but for most people in Japan. Richard and blogger Scott Hensley join the podcast to talk it over.

Scott explains of the use of potassium iodide pills as protection against radioactive iodine and and highlights a few blog posts the week. There's fresh evidence suggesting that fish oil protects against age-related macular degeneration, and a study that finds depressed dads are more likely to spank their young kids.

Plus, two stories about how some people are finally getting a good night's sleep - thanks to surgery.