Tim Laman / Rays of light passing though high montane rainforest on Pico Basile above 2000 m altitude, Bioko Island, Equatorial Guinea, January 2008

Guy Edwardes / Close-up of feathers of Shag (Phalacrocorax aristotelis) Saltee Islands, Co. Wexford, Republic of Ireland, June

Shattil & Rozinski / Morning glory {Ipomoea sp} inside flower close-up, USA

Juergen Freund / Fern Pool - a permanent swimming hole surrounded by lush vegetation, Karajini National Park, Western Australia

Juergen Freund / X-ray of shell of the Venus Comb Murex {Murex pecten}

Juergen Freund / X-ray of shell of spider conch {Lambis chiragra}

Juergen Freund / X-ray of the shell of the Pearly / Chambered nautilus {Nautilus pompilius} showing the internal chambers of the shell.

Juergen Freund / Split-level photograph of coral reef shallows, Rowley Shoals, Western Australia

Jose B. Ruiz / Ro Tinto, or Red River, very acidic and coloured deep red by iron dissolved in the water that drains from the local Riotinto mines causing severe environmental problems. Huelva, Spain .

Doug Perrine / Copper sharks / bronze whaler {Carchahinus brachyurus} and South African fur seal {Arctocephalus pusillus pusillus} preying on sardine baitball {Sardinops sagax} South Africa.

Juergen Freund / Whale shark and person swimming in silhouette {Rhinicodon typus} Indo Pacific

Staffan Widstrand / Deserted beach, Gotska Sandn National Park, Sweden, July 2007