A school of Bluefin Tuna.
Well, it's not often that we talk about radioactive contamination being a good thing, but in the case of the blue fin tuna, it may actually be a life-saver. Scientists are using trace amounts of radiation found in fish from the waters near the Fukushima nuclear disaster in Japan to track their movements across the Pacific.
They hope that studying migratory patterns will help fine tune conservation efforts to protect this dwindling species.
Daniel Madigan, Ph.D candidate at Stanford University and the author of the study joins the show with more.