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.
An arctic fox conceals itself in rye grass covered with hoar frost.
Nunavut, Northwest Territories, Canada.
Penguins swim at the surface, which loads their plumage with air.
Narwhals are resting in a hole in the sea ice.
An airborne emperor penguin at edge of ice floe.
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.
Dovekies returning from sea to nest after feeding on copepods.
A leopard seal bares teeth in a threat display to protect her kill.
Its image mirrored in icy water, a polar bear swims submerged.
Lancaster Sound, Northwest Territories, Canada.
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.
The entrance of the Svalbard Global Seed Vault.
Longyearbyen, Svalbard, Norway.
A Kermode bear mother climbs a crab apple tree to grab its fruit.
Wild Atlantic salmon make their way upstream through clear waters.
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.
A ring seal looks for polar bears through the surface of its hole.
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.
A grizzly bear fishes in the middle of a waterfall.
Katmai National Park and Preserve.
Portrait of a moose in Denali National Park.
Denali National Park, Alaska.
A penguin swims at the surface, which loads its plumage with air.
Going go sea, gentoo penguins, line up and quickly dive in together.
Antarctica Peninsula, Antarctica.
Narwhals come up in seal holes and rotten ice to catch a breath.
A male polar bear taking its image with a camera trap.
A pair of narwhals rubbing their tusks on one another.
Walruses migrating from Russia.
Monterey Bay aquarium, California.
The aurora borealis creates swirls of blue light in the night sky.
A Kermode bear, a black bear born with white fur, perches on a rock.
The northern lights light up the sky.
Tartan Rapids, Northwest Territories, Canada.
Hornsund through the eye of glacier ice.
Hornsund, Spitsbergen, Svalbard, Norway.
Nutrients from sea birds drop into the ocean nourishing sea life.
Preparing to strike, a sailfish circles a ball of sardines.
Swordfish drive their prey toward the surface for easier feeding.
A Kermode bear settles into a mossy bed at the foot of a red cedar.
On alert, an adult leopard seal scans her surroundings.
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.
An American bald eagle in flight.
Narwhals gather en masse to eat codfish.
A bridge over a portion of the Multnomah falls in Oregon.
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.
A polar bear covers his eyes to get some sleep in his bright white surroundings .
A polar bear shakes off the water as he pulls himself onto the ice.
A school of Atlantic salmon hold in a clear river waiting to spawn.
Gaspe, Quebec, Canada.
An American bald eagle flies in for a landing.
In search of wild salmon, this fisherman casts into a healthy stream.
Hvita River, Iceland.
A brilliant display of aurorae over Grey Mountain.
Whitehorse, Yukon Territory, Canada.
A kittiwake soars over a large iceberg in a fiord in Svalbard.
A close view of a crevice in Antelope Canyon.
Antelope Canyon, Arizona.
A group of Atlantic salmon swimming upriver to spawn.
A trio of playful husky puppies.
Global Explorer, an ROV capable of diving 9,400 ft. works off ship.
CANADA BASIN, ARCTIC OCEAN.
A leopard seal brings her catch unnervingly close to the photographer.
Autumn view of tundra and the Ogilvie Mountains.
Ogilvie Mountains, Yukon Territory, Canada.
Two arcs of aurorae form in the north sky.
Yellowknife, Northwestern Territories, Canada.
Two polar bears square off at full height for a sparring match.
Crabeater seal resting on an iceberg.
A waterfall flows into a pool in Oregon.
Scenic view of Grand Canyon National Park in Arizona.
Grand Canyon National Park, Arizona.
An archaeologist descends into the Holtun cenote minutes before the moment when the sun is directly overhead.
Manatees swim close to the water's surface because they are air-breathing mammals.
Blue Spring State Park, Florida.
A beautiful rainbow rises from its reflection on the icy Arctic Ocean.
Foxe Basin, Nunavut, Canada.
A three-month old walrus calf finds refuge on her mother's back.
Igloolik, Nunavut, Northwest Territories, Canada.
Close view of white mountain avens flowers (Dryas octopetala).
The aurora borealis illuminates the sky above Nahanni National Park.
Nahanni National Park Reserve, Northwest Territories, Canada.
A bowhead whale also known as a Greenland right whale (Balaena mysticetus) has its tail above the water's surface.
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