It Took 2.1 Years For Fukushima's Radioactive Plume to Reach Us

Cesium 134 and cesium 137: The two isotopes that were released into the Pacific Ocean when an earthquake ruined the Fukushima Daiichi nuclear power plant on the eastern coast of Japan in 2011. The panic over the leakage was instantaneous in the US--but a new study shows whether it was valid.