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Shoreline view of the historic Bainbridge Steel Dam near Ash Fork, Kaibab National Forest, Arizona, United States of America

Young curious female polar bear (Ursus maritimus), on fast ice near Hinlopen Strait in the Svalbard Archipelago, Norway

Adult king penguin (Aptenodytes patagonicus) amongst chicks at breeding colony at Gold Harbour, South Georgia Island, Polar Regions

Antarctic shag (Phalacrocorax atriceps bransfieldensis), in flight with nesting material in its beak at Jougla Point, Antarctica, Polar Regions

Curious southern elephant seal (Mirounga leonina) weaner pup inspects the spotting scope at Gold Harbour, South Georgia, Polar Regions

A rare sighting of an adult female sea otter (Enhydra lutris kenyoni) hauled out on land in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

Northern (Steller) sea lion (Eumetopias jubatus) hauled out in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

Adult black-legged kittiwake (Rissa tridactyla) in combat with a second kittiwake near Alexander Island, Franz Josef Land, Russia, Arctic Ocean, Eurasia

Adult cape petrels (Daption capense), in flight near Deception Island, Antarctica, Southern Ocean, Polar Regions

Adult crabeater seal (Lobodon carcinophaga), hauled out on iceberg at Booth Island near the Antarctic Peninsula, Polar Regions

Brunnich's guillemot (Uria lomvia) in flight near breeding and nesting site at Cape Fanshawe in Svalbard, Norway, Arctic, Europe

Common guillemot (Uria aalge) nesting on Bear Island (Bjornoya) in the Svalbard Archipelago, Norway, Arctic, Europe

An adult ivory gull (Pagophila eburnea) on ringed seal kill on Spitsbergen in the Svalbard Archipelago, Norway, Arctic, Europe

Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe

Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe

Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on Genovesa (Tower) Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

The very colorful Galapagos land iguana (Conolophus subcristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult Nazca booby (Sula grantii) pair in courtship in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Galapagos penguin (Spheniscus mendiculus) feeding underwater on small baitfish in the Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult gentoo penguins (Pygoscelis papua), returning and coming from the sea at Booth Island, Antarctica, Southern Ocean, Polar Regions

A curious young polar bear (Ursus maritimus) approaches the National Geographic Explorer in the Svalbard Archipelago, Norway, Arctic, Europe

Adult mourning gecko (Lepidodactylus lugubris), at night on the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

Adult wandering albatross (Diomedea exulans) in flight near the Tristan da Cunha Group, South Atlantic Ocean

Antarctic fur seal (Arctocephalus gazella) foraging at sea near South Georgia, Southern Ocean, Polar Regions

King penguin (Aptenodytes patagonicus) detail at breeding and nesting colony at St. Andrews Bay on South Georgia, Southern Ocean, Polar Regions

King penguins (Aptenodytes patagonicus) swimming near the beach at breeding and nesting colony at Salisbury Plain in the Bay of Isles, South Georgia, Southern Ocean, Polar Regions

King penguin (Aptenodytes patagonicus) adult and chick at breeding and nesting colony at Salisbury Plain, South Georgia, Polar Regions

Adult Commerson's dolphin (Cephalorhynchus commersonii), surfacing in Stanley Harbor in the Falkland Islands, South America

Adult male Antarctic fur seal (Arctocephalus gazella) harassing a skua at Torgersen Island, Antarctica, Polar Regions

Crabeater seals (Lobodon carcinophaga) hauled out on ice floe in Neko Harbor near the Antarctic Peninsula, Antarctica, Polar Regions

Neotropic cormorant (Phalacrocorax brasilianus, Phalacrocorax olivaceus, Nannopterum brasilianum), Lake Sandoval, Tambopata National Reserve, Peru, South America

Adult chinstrap penguins (Pygoscelis antarctica) mating at Baily Head on Deception Island, Antarctica, Southern Ocean, Polar Regions

Chinstrap penguin (Pygoscelis antarctica) breeding colony at Baily Head on Deception Island, Antarctica, Southern Ocean, Polar Regions

Gentoo penguin (Pygoscelis papua) chicks covered with mud and guano on Cuverville Island, Antarctica, Southern Ocean, Polar Regions

Male great frigatebird (Fregata minor) in breeding plumage in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult cactus finch (Geospiza scandens), one of the 15 species of Darwin's finches, on Isla Santa Cruz, Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

King penguin (Aptenodytes patagonicus) breeding and nesting colony on South Georgia Island, Southern Ocean, Polar regions

King penguins (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions

White-faced saki (Pithecia pithecia), Rainforest Pyramid, Moody Gardens, Galveston island, Gulf of Mexico, Texas, United States of America

A Red Squirrel (Sciurus vulgaris), in conifer woodland on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

A Red Squirrel (Sciurus vulgaris), in conifer woodland on Brownsea Island, a nature reserve in Poole Harbour, Dorset, England, United Kingdom, Europe

Adult female killer whale (Orcinus orca) surfacing in Chatham Strait, Southeast Alaska, United States of America, Pacific Ocean, North America

Creative motion blur image of adult king penguins (Aptenodytes patagonicus) returning to the sea on South Georgia, Polar Regions

Angry brown capuchin monkey (Cebus apella) (Sapajus apella) on tree, Tambopata National Reserve, Puerto Maldonado, Tambopata Province, Madre de Dios, Peru, South America

Southern elephant seal (Mirounga leonina) weaner pup eye detail on the beach at Gold Harbour on South Georgia, Polar Regions

Author Carl Safina photographing a pair of Magellanic penguins (Spheniscus magellanicus), Patagonia, Argentina, South America

Adult brown bear (Ursus arctos) near kayakers along the shoreline at Pavlof Harbor on Chichagof Island, United States of America, North America

Adult female sea otter (Enhydra lutris kenyoni) swimming in Inian Pass, Southeastern Alaska, Pacific Ocean, United States of America, North America

Curious crabeater seals (Lobodon carcinophaga), swimming near iceberg at Booth Island near the Antarctic Peninsula, Polar Regions

Adult gentoo penguin (Pygoscelis papua), amongst Adelie penguins (Pygoscelis adeliae), at Brown Bluff, Antarctica, Polar Regions

Chinstrap penguins (Pygoscelis antarctica), ecstatic display at breeding colony at Half Moon Island, Antarctica, Polar Regions

Curious adult bull walrus (Odobenus rosmarus rosmarus) approach the ship at Moffen Island in the Svalbard Archipelago, Norway, Arctic, Europe

Adult Svalbard reindeer (Rangifer tarandus platyrhynchus) grazing on tundra in the Svalbard Archipelago, Norway, Arctic, Europe

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Spotted eagle rays (Aetobatus narinari) underwater at Leon Dormido Island off San Cristobal Island, Galapagos, UNESCO World Heritage Site, Ecuador, South America

Adult Swallow-tailed gull (Creagrus furcatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

The very colorful Galapagos land iguana (Conolophus subcristatus) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on North Seymour Island, Galapagos Islands, UNESCO World Heritage Site, Ecaudor, South America

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on Genovesa (Tower) Island, Galapagos Islands, UNESCO World Heritage Site, Ecuador, South America

Adult Galapagos brown pelican (Pelecanus occidentalis urinator) in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Adult black noddy (Anous minutus) breeding site on Boatswain Bird Island just off Ascension Island, South Atlantic Ocean

Adult South Georgia Pipit (Anthus antarcticus) feeding at low tide on Prion Island, Bay of Isles, South Georgia, Polar Regions

Adult black-browed albatross (Thalassarche melanophrys), pair in courtship display at nesting site on New Island, Falklands, South America

Adult king penguins (Aptenodytes patagonicus) returning from sea to the nesting colony at Salisbury Plain, South Georgia, Polar Regions

Adult king penguins (Aptenodytes patagonicus) returning to sea from the nesting colony at Salisbury Plain, South Georgia, Polar Regions

Southern elephant seal (Mirounga leonina) pup lips being probed by a brown skua (Catharacta lonnbergi), South Georgia, Polar Regions

Adult black-legged kittiwake (Rissa tridactyla) on nest with chick in the Svalbard Archipelago, Barents Sea, Norway, Arctic, Europe

Male Great frigatebird (Fregata minor) in breeding plumage with red gular pouch, on North Seymour Island, Galapagos Islands, UNESCO World Heritage Site, Ecaudor, South America

Blue-footed booby (Sula nebouxii) courtship behavior in the Galapagos Island Archipelago, UNESCO World Heritage Site, Ecuador, South America

Vanikoro flycatcher (Myiagra vanikorensis), looking for insects at the Volivoli Resort grounds on Viti Levu, Fiji, South Pacific, Pacific

King penguins (Aptenodytes patagonicus) in downy plumage (okum boys) on South Georgia Island, Polar Regions

Adult pied butcherbirds (Cracticus nigrogularis), taking flight in Vansittart Bay, Kimberley, Western Australia, Australia, Pacific

Chinstrap penguins (Pygoscelis antarctica), ecstatic display at breeding colony at Half Moon Island, Antarctica, Polar Regions

The endemic Galapagos marine iguana (Amblyrhynchus cristatus) with a lava lizard on top of its head, Galapagos, UNESCO World Heritage Site, Ecuador, South America