NPR News: Clues In That Mysterious Radioactive Cloud Point Toward Russia

Clues In That Mysterious Radioactive Cloud Point Toward Russia
Western scientists say they may never know the source of the cloud of ruthenium-106 that hovered over Europe last month. But what little data there is suggests a research facility inside Russia.

Đọc tiếp trên NPR
November 17, 2017 at 11:34PM
Environment