The particular geochemistry of Río Tinto, a river in southern Spain, makes it a good analogue to Mars. Now this wondrous red river has become a laboratory for Nasa operations destined to explore ...

Founded in London in 1873 to mine copper along the Rio Tinto river in southern Spain, the miner became a dual-listed company in 1995 with the merger of its U.K. and Australian assets. In pressing for ...