A team of scientists seeking to develop a historical database of uranium concentrations in the environment has analyzed a long core of ice and snow drilled from atop Europe’s tallest mountain. From the data, they’ve assembled the first century-long record of uranium lofted to a high altitude.
The researchers collected the 140-meter-long ice core in 1994 at an altitude of about 4,250 m, near the summit of France’s Mont Blanc.
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