The Japanese Ministry of Education, Culture, Sports, Science and Technology say they've found leaked strontium 89 and 90 in dirt and plant samples around Fukushima—the first instance since the accident last month.

Strontium 90 is particularly disturbing, as it possesses a half life of 29 years, and can be inhaled or ingested, accumulating in the body's skeleton and raising one's risk of bone cancers and leukemia. [Bulletin of the Atomic Scientists]