The abandoned company mine workers village in Chuquicamata open pit copper mine, Atacama Desert, Chile, South America

Saint Rochus of Montpelier, patron saint against plague, holding model of the church St. Sebald, statue under canopy made of copper with verdigris at the corner of the house Egidienplatz and Theresienplatz, Nuremberg, Middle Franconia, Franconia, Bavaria, Germany, Europe

R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.

R?o Tinto, Andalucia, Spain *** Local Caption *** R?o Tinto ("Red River") is very acidic (Ph 2) and has a deep reddish hue due to iron dissolved in water. The acidity of the watercourse is linked to the drainage of pyrite, which is very present in the subsoil. Extremophilic and endemic bacteria and algae colonize the river bed, forming a fragile biofilm that evokes the hot springs of Yellowstone Park in the USA.