David Shale / Hydromedusa/ Trachymedusa (Crossota sp) from approx 2700m, mid Atlantic ridge, June 2010

David Shale / Fang Tooth {Anoplogaster cornuta} close-up of head showing teeth, from the Mid-Atlantic Ridge, 2600m

Peter Cairns / 2020VISION / Rock outcrop formed of Ordovician quartzite on Stiperstones Ridge, Stiperstones National Nature Reserve, Shropshire, England, UK, August 2012.

Floris van Breugel / Winter snowstorm with frost covered trees , Hurricane Ridge, Olympic National Park, Washington, USA, February 2012.

David Noton / Les Aiguilles de Bavella, Corsica, France. June 2011.

David Shale / Solenosmilia sp and eunicid polychaete and bamboo coral. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pencil urchin (Cidaroid). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Pencil urchin (Cidaroid). Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Black coral (Antipatharia) with tendrils extruded to catch prey. Collected from coral sea mount near Dragon vent field on SW Indian Ridge, Indian Ocean.

David Shale / Close up of deepsea Basket star (Gorgonocephalus sp) from coral seamount, SW Indian Ridge, Indian Ocean, December 2011

David Shale / Male and Female glass shrimps on Glass sponge (Hexactinellida) from coral seamount, SW Indian Ridge, Indian Ocean, December 2011

Erlend Haarberg / Tourists walking on Blahnjukur Volcano, Rhyolite mountains, Landmannalaugar, Iceland, August 2008

Gerrit Vyn / Kangaroo Ridge in the North Cascades, in winter, Okanogan National Forest, Washington, USA, November 2010

Konstantin Mikhailov / Map showing Grossglockner High Alpine Road with the Hohe Tauer Ridge, Hohe Tauern National Park, Austria, Europe, May 2009

Graham Eaton / View of frozen Llynnau Mymbyr, a mountain lake, with fog partly revealing a mountain ridge, Snowdonia NP, Gwynedd, Wales, UK, December

Mark Hamblin / 2020VISION / Mountain hare (Lepus timidus) sitting on a ridge, in winter coat in snow, Cairngorms NP, Scotland, UK, February

Mark Hamblin / 2020VISION / Mountain hare (Lepus timidus) in winter coat, running along a snow ridge, Scotland, UK, February

Martin Gabriel / Mountain ridges of Caldera de Taburiente silhouetted through clouds. View from Roque de los Muchachos, La Palma Island, Canary Islands, Spain, February.

Kirkendall-Spring / Meadow flowers blooming on Mazama Ridge in Mount Rainier National Park with the Tatoosh Range in the distance, Washington, USA, August 2009

Peter Cairns / 2020VISION / Silhouette of herd of female Red deer (Cervus elaphus) on ridge at dawn, RSPB Forsinard Flows, Flow country, Caithness, Highland, Scotland, UK, June 2011. Did you know? Red deer are essentially forest...

Erlend Haarberg / Sunlit ridges against volcanic scree beneath a low cloud. Eyjafjallajokull, Iceland, April 2010. Highly commended in Wildlife Photographer of the Year 2011 competition, Wild Places category.

Orsolya Haarberg / Ash plume, white cloud and snowy ridge at the subglacial volcanic eruption under the Eyjafjallajokull ice cap in Iceland, April 2010. Second place in Landscape category of the GDT 2011 competition

Bryan and Cherry Alexander / People walking down a snow slope to Windy Ridge, with altocumulus undulatus clouds above them. Patriot Hills. West Antarctica, January 2006.

Charlie Summers / Elk / Wapiti (Cervus canadensis) stag Bull standing on snowy ridge, Yellowstone National Park, Wyoming, USA

David Shale / Deepsea benthic Sea cucumber (Peniagone sp) with commensal polynoid polychaete, from mid atlantic ridge, depth approx 2600m, June 2010

David Shale / Deepsea benthic Sea cucumber (Peniagone porcella) from mid atlantic ridge, depth approx 2500m, June 2010

David Shale / Deepsea Gorgonian coral (Metallogorgia sp.) from mid atlantic ridge

David Shale / Underside of deepsea Sea cucumber (Deima validum) from 2500m, mid Atlantic ridge, June 2010

David Shale / Hydromedusa / Trachymedusa (Crossota sp) showing tentacles, from approx 2700m, mid Atlantic ridge, June 2010

David Shale / Hydromedusa / Trachymedusa (Crossota sp) from approx 2700m, mid Atlantic ridge, June 2010

Bryan and Cherry Alexander / Mountain scenery along coast of the Chukotskiy Peninsula. Bering Strait, Chukotka, Siberia, Russia.

Alex Mustard / Bottlenose dolphin (Tursiops truncatus) swimming beneath a calm sea surface, Sandy Ridge, Little Bahama Bank. Bahamas.

Alex Mustard / A pod of Atlantic spotted dolphins (Stenella frontalis) riding on the bow wave of a boat. Sandy Ridge, Little Bahama Bank. Bahamas

Alex Mustard / Bottlenose dolphin (Tursiops truncatus) in shallow water over a sand bank. Sandy Ridge, Little Bahama Bank, Bahamas. Tropical West Atlantic

Alex Mustard / Bottlenose dolphins (Tursiops truncatus) in shallow water over a sand bank. Sandy Ridge, Little Bahama Bank, Bahamas. Tropical West Atlantic

Alex Mustard / A pod of Bottlenose dolphins (Tursiops truncatus) swimming beneath a calm sea surface. Sandy Ridge, Little Bahama Bank. Bahamas.

Alex Mustard / Two Atlantic spotted dolphins (Stenella frontalis) over a shallow sand bank. On the left is a juvenile which does not have the characteristic spots of the adults. The adult is carrying a piece of weed...

Alex Mustard / Bottlenose dolphin (Tursiops truncatus) with surface reflection, in shallow water over a sand bank. Sandy Ridge, Little Bahama Bank, Bahamas. Tropical West Atlantic

Jeff Wilson / Aerial view of K2 and glaciated valley of Concordia, Karakoram Mountains, Himalayas, Pakistan. From Pakistani military helicopter for BBC series Planet Earth April 2005

Jeff Wilson / Aerial view of K2 and glaciated valley, Concordia, Karakoram Mountains, Himalayas, Pakistan. From Pakistani military helicopter for BBC series Planet Earth 2005

Aflo / Y-6504 Cirrus clouds in blue sky above mountain range, North America

Colin Monteath / Clouds covering Lake Coleridge and Rakaia River from Mount Oakden with Mount Hutt on right, Canterbury, New Zealand

Patricio Robles Gil / Aerial view of Gorely volcano (1,829m) with snow on slopes, Kamchatka, Russia, August 2006

Patricio Robles Gil / Silverberry River, Backbone Range, Mackenzie Mountains, Northwest Territories, Canada

Will Watson / Domestic horse, grey Welsh Pony (Equus caballus) and walkers in snow on Offa's Dyke Path, Hergest Ridge, Wales, UK. February 2009

Doug Allan / Climbers on summit ridge at 6,000m, Mount Illampu, Bolivia, March 2005. Freeze Frame book plate page 137.

Peter Cairns / Silhouette of Red deer (Cervus elaphus) stag on ridge, Alladale, Sutherland, Scotland, UK, February.

Laurie Campbell / Quiraing, Trotternish Ridge, Isle of Skye, Scotland, December

Andy Rouse / Aerial view of ice ridges at front of Peters Glacier, King Haakon Bay, South Georgia, Antarctica, December 2006

Andy Rouse / Aerial view of ice ridges at the front of Peters Glacier, King Haakon Bay, South Georgia, Antarctica, December 2006

David Shale / Medusa caught with 1m ring net between 0 and 150m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea amphipod {Scypholanceola stephensi} from between 500 and 800m, night, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea squid from midwater catch 195-498m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Close up of mouth of a Bristleworm {Polychaeta} from the Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Decapod {Systellaspis sp} from midwater catch 195-498m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Bristleworm {Polychaeta} from the Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Glass squid {Teuthowenia megalops}, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Midwater Bristlemouth fish {Sigmops elongatum} night, 188 - 507m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea amphipod from between 507-805m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Head-on view of Spothead lanternfish {Diaphus metopocampus} from between 500 and 800m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea squid (Histioteuthis sp) showing funnel, from between 188m/617ft and 507m/1,663ft depth, night, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Head-on view of Spothead lanternfish {Diaphus metopocampus} from between 500 and 800m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea octopus (Benthoctopus johnsoniana) Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea octopus (Benthoctopus johnsoniana) Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea Medusa jellyfish (Colobonema sp), Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Piglet squid {Helicocranchia sp} from between 500 and 200m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea Narrow-necked oceanic eel {Derichthys serpentinus} from between 188 and 507m in the Mid-Atlantic Ridge, North Atlantic Ocean

Wild Wonders of Europe / D'Amicis / Photographer, Bruno D'Amicis, walking on a ridge, Western Tatras, with Mount Krivn (2,495m) in the background, Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / D'Amicis / Male Tatra chamois (Rupicapra rupicapra tatrica) on rocky ridge near Arolla pines (Pinus cembra) Western Tatras, Carpathian Mountains, Slovakia, June 2009

Wild Wonders of Europe / D'Amicis / Female European brown bear (Ursus arctos) with two yearling cubs walking on snow field on mountain ridge, Western Tatras, Carpathian Mountains, Slovakia, June 2009

David Shale / Shelled Pteropod / Sea butterfly {Diacria trispinosa} with egg string attached, from between 188 and 507m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Fangtooth (Anoplogaster cornuta) portrait, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea Dragonfish {Eustomias monodactylus} with bioluminescent lure, from between 498 and 805m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Greater silver hatchet fish (Argyropelecus gigas) Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Lizard fish (Bathysaurus ferox) head portrait, from 2750m / 9022ft, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea heteropod mollusc (Carinaria lamarcki) from between 188m and 74m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea squid (Histioteuthis sp) from between 188m/617ft and 507m/1,663ft depth, night, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Deepsea heteropod molluscs (Carinaria lamarcki) from between 188m and 74m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Heteropod mollusc (Atlanta peroni) from between 195-498m / 640-1634ft, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Comb Jelly {Bollinopsis ssp} caught with 1m ring net between 0 and 150m, comb plates, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Bigeye smooth-head (Bajacalifornia megalops) head portrait, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Octopod {Grimpoteuthis discoveryi} Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / View inside the mantle of the deepsea Octopod {Grimpoteuthis discoveryi} Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Viper fish {Chauliodus sloani}, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Eryonicus larva of Shrimp {Polycheles sp) from between 2710-2798m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Lancetfish {Alepisaurus brevirostris} from Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Midwater pteropod molluscs / Sea butterflies (Clione limacina) Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Head of Lancetfish {Alepisaurus brevirostris} from Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Juvenile Searsid {Maulisia sp}, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Angler fish Melanocetus murrayi, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Juvenile Searsid {Maulisia sp}, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Snail fish {Careproctus sp} 0 - 1387m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Angler fish (Melanocetus murrayi) Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Giant ostracod {Gigantocypris mulleri} from between 718 and 1864m, Mid-Atlantic Ridge, North Atlantic Ocean

David Shale / Angler fish {Linophryne sp} from the Mid-Atlantic Ridge, North Atlantic Ocean