1348-4741 - Gastric Ulcer, Illustration

1348-4742 - Gastric Ulcer, Illustration

860-288801 - Clay loaded with iron oxides and dried out, Rio Tinto, Andalusia, 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.

860-288798 - Reflections on Rio Tinto, near its source, Andalusia, 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.

860-288800 - 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.

860-288799 - 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.

857-95805 - A blue coloured boiling hot mud pool emanates steam as the sunset colours the sky orange, in Hveraröndor Hverir Geothermal Area at Namaskard Pass, North Iceland.

1116-39733 - This Pink Anemonefish (Amphiprion perideraion) is in an anemone (Heteractis magnifica) that is bleaching from high ocean temperatures and heat stress, Yap, Micronesia

1116-39731 - This Pink Anemonefish (Amphiprion perideraion) is in an anemone (Heteractis magnifica) that is bleaching from high ocean temperatures and heat stress, Yap, Micronesia

1116-39953 - This hard coral colony in the Pacific has begun to bleach, expelling its symbiotic zooxanthellae, consequences of global climate change and climate warming, Yap, Micronesia

1116-39954 - This pink anemonefish (Amphiprion perideraion), is in an anemone (Heteractis magnifica) that is bleaching from high ocean temperatures and heat stress, Yap, Micronesia

832-124000 - Echinus Geyser with the world's highest acidity, Back Basin, Norris Geyser Basin, geysers, colored thermophilic bacteria, microorganisms, geothermal springs in Yellowstone National Park, Wyoming, United States of America, USA