Predicting bioavailable cadmium levels in soils

New Zealand's pastoral landscapes are some of the loveliest in the world, but they also contain a hidden threat. Many of the country's pasture soils have become enriched in cadmium. Grasses take up this toxic heavy metal, ...

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Twitter buys data analytics partner Gnip

Twitter says it has bought its data partner Gnip, which provides analysis of the more than 500 million tweets its users share each day—to advertisers, academic institutions, politicians and other customers.

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