Japanese officials have announced the discovery of even more radioactive material beyond the confines of the Fukushima plant, this time a staggering 38 miles away. The material in question is strontium—and although detected in low levels, is dangerous.

Strontium 90 is particularly concerning, as it replaces calcium in the body's skeleton, emitting beta rays from within, and has a half-life of 50 days. Not something you want in your dirt. [Kyodo News and Mainichi]