Mark Hamblin / 2020VISION / Whiteboard describing list of recent sightings from bird hide, Dyfi Osprey Project, Powys, Wales, UK, May 2012.

Doc White / Local wildlife guide Hugo Hoyos on board a floating home on the Rio Negro, Amazonia, Brazil, June 2012. Model released.

Kathryn Jeffs / Camera lens view of crew on board the 'Golden Fleece' in the centre of a horseshoe shaped iceberg off the Antarctic Peninsula, Antarctica, February 2009, Taken on location for BBC Frozen Planet series

Jeff Rotman / Lower jaw of 6 meter Great White Shark (Carcharodon carcharias) showing rows of replaceable teeth. Natal Shark Board Collection, South Africa

Jeff Rotman / Teeth of upper jaw of 6 metre Great White Shark specimen (Carcharodon carcharias) Natal Sharks Board Collection, South Africa

Barry Bland / Surfer falling off board in white water, St Clair Beach, Dunedin, New Zealand.

Barry Bland / Surfer falling off board in white water, Black Head, Dunedin, New Zealand.