date:May 31, 2012
off California and the tip of Baja California, Mexico.
Five months after the Fukushima disaster, Mr Fisher of Stony Brook University in New York and a team decided to test Pacific bluefin that were caught off the coast of San Diego. To their surprise, tissue samples from all 15 tuna captured contained levels of two radioactive substances -- ceisum-134 and cesium-137 -- that were higher than in previous catches.
To rule out the possibility that the radiation was carried by ocean currents or dep