According to a statement released by the Autonomous University of Barcelona (UAB), the Romans extracted gold from alluvial deposits in the Eastern Pyrenees. Using optically stimulated luminescence dating techniques, Oriol Olesti Vila of the UAB and Jorge Sanjurjo-Sánchez of the University of A Coruña dated two samples of fill from the remains of an ancient hydraulic structure on the Segre River to the third and fourth centuries A.D. The researchers explained that Roman miners would have eroded gold deposits from the riverbanks with water, and then washed them, either by channeling water through the sediments or flooding the sediments with...