An emperor penguin chick on the frozen Ross Sea.
Cape Washington, Ross Sea, Antarctica.
PAUL NICKLEN/National Geographic Creative
An emperor penguin prepares to launch from the sea to the sea ice.
Emperor penguins share a hole in the sea ice.
Ross Sea, Antarctica.
Two chinstrap penguin chicks rest on the side of a large iceberg.
Antarctic Peninsula, Antarctica.
Lights enhance the cathedral-like features of the Holtun cenote as archaeologists dive in.
Yucatan Peninsula, Mexico.
A bowhead whale surfaces from a dive at the floe edge.
Lancaster Sound, Nunavut, Canada.
Emperor penguins are capable of diving to 1,750 feet.
Penguins swim at the surface, which loads their plumage with air.
An airborne emperor penguin at edge of ice floe.
An arctic fox conceals itself in rye grass covered with hoar frost.
Nunavut, Northwest Territories, Canada.
Narwhals are resting in a hole in the sea ice.
A walrus flicks his huge tusks.
Bellsund, Spitsbergen, Svalbard, Norway.
A young male polar bear leaping onto drifting pack ice.
Svalbard, Arctic Ocean Islands.
A manatee in Lynbia algae which has invaded Florida's waterways.
Crystal River Springs Preserve, Florida.
Its image mirrored in icy water, a polar bear swims submerged.
Lancaster Sound, Northwest Territories, Canada.
A leopard seal bares teeth in a threat display to protect her kill.
A polar bear snuggles up with her cubs.
Churchill, Manitoba, Canada.
A mother polar bear and her cub.
A Kermode bear eats a fish in a moss-draped rain forest.
Great Bear Rainforest, British Columbia, Canada.
A pair of emperor penguins with their chick on the frozen Ross Sea.
A Kermode bear mother climbs a crab apple tree to grab its fruit.
The entrance of the Svalbard Global Seed Vault.
Longyearbyen, Svalbard, Norway.
Dovekies returning from sea to nest after feeding on copepods.
A ring seal looks for polar bears through the surface of its hole.
A polar bear shakes water off its head as it breaks the surface.
Baffin Island, Nunavut, Canada.
A pod of male narwhals gather at the Arctic ice edge to eat cod.
Two narwhals rise out of the water in order to catch a breath.
Admiralty Inlet, Lancaster Sound, Nunavut, Canada.
Sailfish hunt sardines using their bills and sails to corner the fish.
Isla Mujeres, Mexico.
A female leopard seal presents her kill to the photographer.
A wet polar bear sticks his head up above the ice.
North Baffin Island, Nunavut, Canada.
Bright bands of aurorae traveling east to west.
Yellowknife, Northwest Territories, Canada.
Krill feeds on phytoplankton that grows on the underside of sea ice.
Portrait of a moose in Denali National Park.
Denali National Park, Alaska.
Going go sea, gentoo penguins, line up and quickly dive in together.
Antarctica Peninsula, Antarctica.
A grizzly bear fishes in the middle of a waterfall.
Katmai National Park and Preserve.
Walruses migrating from Russia.
A pair of narwhals rubbing their tusks on one another.
Narwhals come up in seal holes and rotten ice to catch a breath.
A Kermode bear, a black bear born with white fur, perches on a rock.
A male polar bear taking its image with a camera trap.
Hornsund through the eye of glacier ice.
Hornsund, Spitsbergen, Svalbard, Norway.
Preparing to strike, a sailfish circles a ball of sardines.
Swordfish drive their prey toward the surface for easier feeding.
A penguin swims at the surface, which loads its plumage with air.
Nutrients from sea birds drop into the ocean nourishing sea life.
Wild Atlantic salmon make their way upstream through clear waters.
On alert, an adult leopard seal scans her surroundings.
A Kermode bear settles into a mossy bed at the foot of a red cedar.
A gentoo penguin peeks beneath the water before taking the plunge.
Port Lockroy, Antarctica.
After feeding, a bowhead whale comes to the surface to rest.
A polar bear and her cub rest on an iceberg in the Arctic Ocean.
A bridge over a portion of the Multnomah falls in Oregon.
The aurora borealis creates swirls of blue light in the night sky.
A portrait of an arctic fox (Alopex lagopus).
Northwest territories, Canada.
Fairy basslet fish (Gramma loret) dart among blooms of lettuce coral.
PHOENIX ISLANDS, KIRIBATI, POLYNESIA.
Anemonefish on a manra reef. Rarity to see so many together.
Narwhals gather en masse to eat codfish.
A polar bear shakes off the water as he pulls himself onto the ice.
A kittiwake soars over a large iceberg in a fiord in Svalbard.
A school of Atlantic salmon hold in a clear river waiting to spawn.
Gaspe, Quebec, Canada.
A close view of a crevice in Antelope Canyon.
Antelope Canyon, Arizona.
A leopard seal brings her catch unnervingly close to the photographer.
Global Explorer, an ROV capable of diving 9,400 ft. works off ship.
CANADA BASIN, ARCTIC OCEAN.
In search of wild salmon, this fisherman casts into a healthy stream.
Hvita River, Iceland.
An American bald eagle flies in for a landing.
A group of Atlantic salmon swimming upriver to spawn.
The northern lights light up the sky.
Tartan Rapids, Northwest Territories, Canada.
An archaeologist descends into the Holtun cenote minutes before the moment when the sun is directly overhead.
Crabeater seal resting on an iceberg.
A trio of playful husky puppies.
A waterfall flows into a pool in Oregon.
Scenic view of Grand Canyon National Park in Arizona.
Grand Canyon National Park, Arizona.
A brilliant display of aurorae over Grey Mountain.
Whitehorse, Yukon Territory, Canada.
Autumn view of tundra and the Ogilvie Mountains.
Ogilvie Mountains, Yukon Territory, Canada.
Manatees swim close to the water's surface because they are air-breathing mammals.
Blue Spring State Park, Florida.
Two polar bears square off at full height for a sparring match.
A young male Kermode bear walks on a log while fishing for salmon.
Golden Gate Bridge.
San Francisco, California.
A scenic view of cliffs at Yosemite National Park.
Yosemite National Park, California.
Monterey Bay aquarium, California.
Close view of white mountain avens flowers (Dryas octopetala).
A walrus returning to its haulout site after feeding on clams.
Thick billed murres diving to feed off of Bear Island.
Bear Island, Svalbard, Arctic Ocean Islands.
Without ice, a mother bear and cubs are stranded on a rocky shoreline.
A technical diver descends into The Pit cenote amid toxic hydrogen sulphide gas clouds.
Quintana Roo, Mexico.
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