A city near the Ural Mountains in Russia that is increasingly looking like the origin of the radioactive cloud released in September. (David Filipov/The Washington Post)BERLIN — Remember that harmless radioactive cloud that mysteriously drifted across Europe back in September? Experts emphasized that the unusually high levels may still have been harmless. It was Austria that first detected unusually high levels of radiation Oct. 3, with Germany confirming them the next day. Its researchers recorded radiation almost 1,000 times as high as normal levels there — higher than almost anywhere else in Europe.

Source: Washington Post November 21, 2017 14:02 UTC