Vincent Grafhorst / Minden / River in sandstone cave, Sof Omar Cave, Ethiopia

Ingo Arndt / Deaths head hawk moth pupa in soil {Acherontia atropos} Germany

Vincent Grafhorst / Stalagmites and stalactites in cave chamber, Gcwihaba Caves, Botswana

Ammonite / Earthworm (Lumbricus terrestris) moving through and feeding on leaf litter, Bristol, England, UK, June.

Ammonite / Earthworm (Lumbricus terrestris) moving through leaf litter, footage taken using an endoscopic camera in controlled conditions, Bristol, England, UK, June.

Inaki Relanzon / Potholer touching a stalagmite whilst exploring the Graller del Boixaguer cave, Montsec mountains, Pyrenees, Catalonia, Spain, May 2012. Model released.

Inaki Relanzon / Potholer exploring the Graller del Boixaguer cave, Montsec mountains, Pyrenees, Catalonia, Spain, May 2012. Model released.

Gavin Hellier / Moving train pulling into the station with people waiting, modern subway station, Berlin, Germany, 2009. No release available.

Juan Carlos Munoz / People descending into the Thrihnukagigur volcano a dormant volcano, now used for tours, Iceland, Europe, June 2012

Chadden Hunter / Entering the ice caves of Mount Erebus, Antarctica. Taken on location for BBC Frozen Planet series, 2009

Nick Garbutt / Atlantic puffins (Fratercula arctica) gathering around burrows on cliff top, Isle of Lunga, Treshnish Isles, Isle of Mull, Scotland, UK, June

Paul Hobson / Portrait of Puffin (Fratercula arctica) in nest burrow, Shetland, Scotland, UK, July