One marker of ice loss on Kilimanjaro was the radioactive signature of fall-out from atomic tests carried out in the early 1950s.

乞力马扎罗山峰冰雪消融的标志是在20世纪50年代早期开展的原子能测试产生辐射尘的放射性特征。

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The technology works by attaching a radioactive marker, called thioflavin, to the tangles of protein, known as amyloid plaques, that are found in the brains of patients with Alzheimer's.

BBC: NEWS | Health | Alzheimer's tracked in patients