20 noviembre 2014
Hidden under the vegetation and crops of the Eria Valley, in León (Spain), there is a gold mining network created by the Romans two thousand years ago, as well as complex hydraulic works, such as river diversions, to divert water to the mines of the precious metal. Researchers made the discovery from the air with an airborne laser teledetection system.
http://feeds.sciencedaily.com/~r/sciencedaily/~3/ei50fZHWLGo/141120082134.htm
