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.
832-386569 - Hikers on the hiking trail PR6 to the 25 springs, along water channel, Levada das 25 Fontes, in rainforest, laurel forest Laurisilva, Rabacal nature reserve, island Madeira, Portugal, Europe
1311-174 - Grand Canyon view from the Tanner Trail with only the twilight glow as the light source, Grand Canyon National Park, UNESCO World Heritage Site, Arizona, United States of America, North America
860-287450 - Tara Oceans Expeditions - May 2011. Tara with deployed plancton nets. On "station", the boat is drifting without engine or sails. Tara Oceans, a unique expedition: Tara Oceans is the very first attempt to make a global study of marine plankton, a form of sea life that includes organisms as small as viruses and bacterias, and as big as medusas. Our goal is to better understand planktonic ecosystems by exploring the countless species, learning about interactions among them and with their environment. Marine plankton is the only ecosystem that is almost continuous over the surface of the Earth. Studying plankton is like taking the pulse of our planet. Recently, scientists have discovered the great importance of plankton for the climate: populations of plankton are affected very rapidly by variations in climate. But in turn they can influence the climate by modifying the absorption of carbon. In a context of rapid physico-chemical changes, for example the acidification observed today in the world's oceans, it is urgent to understand and predict the evolution of these particular ecosystems. Finally, plankton is an astonishing way of going back in time ? a prime source of fossils. Over the eons, plankton has created several hundred meters of sediment on the ocean floors. This allows us to go back in time, to the first oceans on Earth, and better understand the history of our biosphere. More than 12 fields of research are involved in the project, which will bring together an international team of oceanographers, ecologists, biologists, geneticists, and physicists from prestigious laboratories headed by Eric Karsenti of the European Molecular Biology Laboratory. Galapagos
1314-54 - Low tide, crystal sea and granite rocks at Anse Source d'Argent one of the most beautiful beaches in La Digue, Seychelles. Elegant lifestyle tourist woman touches a cute dog sitting on big boulders.
832-382629 - Solfataras, fumaroles, mud pots, sulfur and other minerals, a woman on the viewing platform at the back, high-temperature geothermal area or Hverarond or Hverir, Namafjall mountains, Myvatn area, Norourland eystra, Iceland, Europe