Tree Rings Show Elevated Tungsten Coincides with Nevada Leukemia Cluster

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Paul Sheppard of The University of Arizonas Laboratory of Tree-Ring Research seated at the microscope he uses to count the annual rings in tree cores. Hes holding a block of wood that has one of the pencil-thin cores mounted on top. Photo credit: Lab ...
Paul Sheppard of The University of Arizona's Laboratory of Tree-Ring Research seated at the microscope he uses to count the annual rings in tree cores. He's holding a block of wood that has one of the pencil-thin cores mounted on top. Photo credit: Laboratory of Tree-Ring Research, The University of Arizona

Tungsten began increasing in trees in Fallon, Nev. several years before the town's rise in childhood leukemia cases, according to a new research report.


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