![PBS NewsHour show](https://d3dthqtvwic6y7.cloudfront.net/podcast-covers/000/026/914/small/pbs-newshour-podcast-pbs.jpg)
Summary: With help from fisherman and citizen scientists, researchers in Japan and the U.S. are tracking the nucleotides in the ocean creatures who swim in the plume of water tainted with radiation from Fukushima. Their research is part of a long-term effort to figure out when — if ever — certain fish will be safe to eat. Science correspondent Miles O’Brien reports.