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ArchaeologyThese knotted cords may hide the first evidence that the Incas collected taxes
Some knotted string devices point to crop levies imposed by the Incan empire, researchers say. But other khipus continue to evade description.
By Bruce Bower -
GeneticsGenealogy companies could struggle to keep clients’ data from police
Police probably won’t stop searching DNA family trees to find crime suspects. New restrictions on database searches could spur more fights over privacy.
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LifeSome fungi trade phosphorus with plants like savvy stockbrokers
New views show how fungi shift their stores of phosphorus toward more favorable markets where the nutrient is scarce.
By Susan Milius -