They're adorable and come in all shapes and sizes. When it comes to these animals, there's no such thing as too much of a good thing.

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Domestication shaped wolves into dogs and transformed both their behavior and their anatomy. New discoveries show how dogs produce a very specific eyebrow movement more often than wolves do. But how and why did “puppy dog eyes” develop in domesticated dogs?

The Science of Cute

It’s a pretty tough decision to pick nature's cutest animal - a koala, a penguin, a big-eyed, wobbly-kneed fawn, a fluffy white seal, playing polar bear cubs. It’s a long line-up but expects a lot of oooh’s and awwws while you try to decide!

It’s a pretty tough decision to pick nature's cutest animal - a koala, a penguin, a big-eyed, wobbly-kneed fawn, a fluffy white seal, playing polar bear cubs.

Nature's Cutest

Things are heating up down under! The world’s smallest penguins are looking for love on Australia’s biggest island, but cars, cats, and camera-wielding humans are killing the mood. Will these little penguins persevere and find mates or spend the breeding season alone?

The world’s smallest penguins are looking for love on Australia’s biggest island. Will these little penguins persevere and find mates or spend the breeding season alone?

Little Penguin Love Island

Squirrels are among the most widely known and recognized mammals in the world. Some can fly, some can swim, and they live in diverse habitats–from underground to icy wastelands or burning hot deserts.

Squirrels are among the most recognized mammals in the world. Some can fly or swim, and they live in diverse habitats–from underground to icy wastelands or hot deserts.

Going Nuts: Tales from Squirrel World

From maniacs to sweet-faced assassins, Australia is home to little-known marsupials—small predators with a taste for blood, bone and meat. This is an entertaining introduction to three of the strangest: the numbat, the northern quoll and the dibbler...and those who are trying to keep them safe.

Australia is home to a curious band of little-known marsupials. Meet three of these strange predators: the numbat, the northern quoll and the dibbler.

Cute Little Killers

Much loved, clowns of the sea, seals are endlessly fascinating. Agile hunters and graceful in the water, and yet bloated sausages on land, seals entertain us with dramatic courtships, an endless playful sense of curiosity, and some of the cutest fluffy white babies on the planet.

Agile hunters and graceful in the water, and yet bloated sausages on land, seals entertain us with dramatic courtships, an endless playful sense of curiosity.

Seals - Clowns of the Sea

In their vast and unforgiving home of the Namib desert, meerkats rely on their companions to watch their backs. Only together can they find the strength and resources to defeat the odds stacked against them. One young female is forced from her group after a brutal attack.

In their vast and unforgiving home of the Namib desert, meerkats rely on their companions to watch their backs. One female is forced from her group after an attack.

Meet the Meerkats

The sloth bear is the oddest and wildest looking of all bears. With his shaggy fur, long, gummy jaws and cavernous mouth he presents a strange figure shambling across the dry scrub of India. He was made famous as Baloo in The Jungle Book, and yet remains poorly known and rarely seen.

The sloth bear is the oddest and wildest looking of all bears. He was made famous as Baloo in The Jungle Book, and yet remains poorly known and rarely seen.

Sloth Bears: Birth of a Prince

In the remote mountains of southwest China lives one of the most remarkable, elusive and endangered primates in the world: the Golden Monkey. Journey to beautiful, untouched mountain regions and enjoy unprecedented access to a troop of these unique, rarely filmed animals.

In southwest China's remote mountains lives an elusive and endangered primate: the Golden Monkey. Enjoy unprecedented access to these unique, rarely filmed animals.

China's Hidden Monkeys

Meet a family of Chungungos, the world's mysterious, smallest otter. Living along the untamed coast of the southern Pacific Ocean, these furry, intelligent, and adorable creatures make their home in the wild of Chile.

Meet a family of Chungungos, the world's mysterious, smallest otter.

Chungungo: The World's Smallest Otter

Few countries have a more iconic representative in the animal kingdom than Australia and the marsupial. Marsupials are a weird and wonderful mob of animals who carry their young in a pouch. Whether hopping, climbing, or airborne, marsupials are some of the most fascinating creatures.

Marsupials are a wonderful mob of animals who carry their young in a pouch. Whether hopping, climbing, or airborne, marsupials are some of the most fascinating creatures.

Meet the Marsupials

Europe's legendary pine forests are under siege. An enemy is marching ruthlessly forward, determined to destroy every tree in its path. Meet the pine processionary caterpillar a beast that devours pine forests with military precision.

Europe's legendary pine forests are under siege. An enemy is marching ruthlessly forward, determined to destroy every tree in its path.

March of the Caterpillars

Growing up in Montana, Casey Anderson came to love and appreciate wild animals at a very young age. He found a particular kinship with bears. One day he was faced with a fateful decision, leave and orphaned grizzly cub to die in the wild or save it. Now he is faced with that same decision again.

Bear Cub Rescue

The octopus is as close to an alien being as anything we've seen on Earth. From a feeding frenzy at the bottom of the sea to a mother taking care of thousands of its eggs, travel to the pacific ocean to see them at their best and most weird.

The octopus is as close to an alien as anything we've seen on Earth. From a feeding frenzy at the bottom of the sea to a mother taking care of thousands of its eggs.

Octopus Encounters

Inhabiting forests in the dry regions of southern Madagascar, the distinctively marked ring tailed lemurs live in female dominated groups. Life among the group can be quite contentious at times, with females engaging in scuffles with their young on their backs.

The Ring Tailed Lemur

To many ears, the name mustelid might sound mysterious, but this family of hunters is probably much more familiar than you think. They’re tiny terrors; ankle-height tigers of the undergrowth. Some are elusive hunters while others stand together and fight.

To many ears, the name mustelid might sound mysterious, but this family of hunters is probably much more familiar than you think.

Meet the Mustelids

Two otter pups have been carefully watched over by their mother for a year, but her tireless work will soon come to an end. From here on the pups will have to fend for themselves, one day maybe starting an otter family of their own.

Two otter pups have been carefully watched over by their mother for a year, but her tireless work will soon come to an end.

Seasons of the Otter

The magical landscapes of Wales’ ancient forests and rugged shores are famous for myth and legend. But the wildlife of Wales have extraordinary stories of their own. To survive the unpredictable, wild weather they must show what is known locally as “the dragon’s spirit.”

Wales is famous for myth and legend, but the wildlife have extraordinary stories of their own. To survive, they must show what is known locally as “the dragon’s spirit.”

Wales: Spirit of the Dragon

Cats are cute but cunning, the secretive little predators we barely notice as they slink through the shadows. Though big cats may steal the limelight, the little ones have the highest hunting success rates and each kind has carved out its own techniques and niches.

Cats are cute but cunning, the secretive little predators we barely notice as they slink through the shadows.

Little Cats

Once thought to be mermaids, beautiful sirens that could lure sailors to their deaths, the blubber butts are actually gentle giants - a unique group of marine mammals, the only ones who are strict vegetarians. Elephants and hyraxes complete their bizarre family tree.

Once thought to be mermaids, beautiful sirens that could lure sailors to their deaths, the blubber butts are actually gentle giants.

Manatees On The Move

Few animals are more loved than penguins waddling on ice like clumsy people. They steal our hearts, though it’s underwater that their dynamic shape and predator skills come into their own. But there’s more to penguins than dancing on ice.

Few animals are more loved than penguins waddling on ice like clumsy people. It’s underwater that their dynamic shape and predator skills come into their own.

Penguin Party

Whatever you think of pigs, you’re probably underestimating one of the world’s most amazing animals. A year with wild boars and their relatives reveals a tender and dedicated matriarchal society, playful youngsters, and powerful warriors.

Whatever you think of pigs, you’re probably underestimating one of the world’s most amazing animals.

Meet the Pigs

All over the world, while many species are under threat of extinction, raccoons are experiencing an unprecedented expansion. Behind their innocent, cute look hides an outstanding survivor's temperament. When it comes to feeding and defending themselves, raccoons are capable of anything.

Many species are under threat, but raccoons are experiencing an unprecedented expansion. When they must feed and defend themselves, raccoons are capable of anything.