Tuesday, 28 January 2014

How Tumbleweeds Spread Radiation From Old Nuclear Sites

How Tumbleweeds Spread Radiation From Old Nuclear Sites
Jan 28th 2014, 14:40, by Sarah Zhang

How Tumbleweeds Spread Radiation From Old Nuclear Sites
The tumbleweed, which seems so at home rolling down an American highway, is actually an invasive plant from the Russian steppes. In the relatively short time it's been invading the plains—just over a century—the tumbleweed has managed to establish itself as an indelible symbol of the western landscape. It is the ultimate sleeper cell, we might say, an enemy plant, if we were to resort to Cold War metaphors.
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