An employee collects a sample of light refined diesel fuel for quality control testing at a facility in the Duna oil refinery, operated by MOL Hungarian Oil & Gas Plc, in Szazhalombatta, Hungary. (Photographer: Akos Stiller/Bloomberg)

The Dead Cow Finally Produces Oil, a Century After Its Discovery

(Bloomberg) -- Along the western edge of Argentina’s Patagonia, on an arid steppe nestled against the Andes mountains, lies a shale formation known as the Vaca Muerta. And ever since engineers conf...

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