Ingo Arndt / View of Badlands National Park, with shadows cast between mountain peaks, and sediment layers visible, South Dakota, USA. September 2009.

Ingo Arndt / View of Badlands National Park, with shadows cast between mountain peaks, and sediment layers visible, South Dakota, USA. September 2009.

Ingo Arndt / Waves crashing against ice cliffs of iceberg off the southern tip of South Georgia Island in wind storm, Southern Ocean, Antarctic Convergence, November 2008

Franco Banfi / Split image of Blue shark (Prionace glauca) close to the surface, Pico Island, Azores, Portugal, Atlantic Ocean, July

Erlend Haarberg / Autumn in the birch forest at Hraunfossar. Iceland.

Juan Carlos Munoz / Detail in frozen waterfall. Selijalandfoss waterfall, Southern Iceland, Europe, March 2011.

Floris van Breugel / Autumn colors along the shores of Pharaoh Lake in Adirondacks park, New York, USA. October

Sandra Bartocha / Sea shells in sand, North sea, Germany, September

Sandra Bartocha / Dark clouds above the North Sea, Norderney, Germany, September

Sandra Bartocha / Mixed woodland in spring, Mecklenburg-Strelitz, Mecklenburg-Vorpommern, Germany, April

Jean E. Roche / Aerial view of rows of cultivated Roses, horitculture, Bellegarde, Camargue, Southern France, June 2009

Juan Carlos Munoz / Aerial view of salt pans coloured red by cyanobacteria, Lake Natron, Rift Valley, Tanzania, August 2009