How do animals experience the world around them? How does what they see impact their place in nature and how has their place in nature impacted what they see? We asked Professor Thomas Cronin to show us how the most interesting and prolific eyes in the animal kingdom work and how they came to be.

Bugs, they're everywhere. Get an up close and personal look at the many unique secrets that can be found in the insect world. These creepy crawlies never looked so big!

Consider a whole new world of colorful, fluffy dinosaurs. Feathers, the evolutionary breakthrough that allowed for more stable body temperatures, which translated into outstanding mobility, even in cold weather.

The staff of South Africa’s Manyoni Private Game Reserve passionately care for some of the world’s most exotic and endangered wild animals. From treating elephant foot infections to testing cheetahs for tuberculosis, they never know what to expect each day.

Adaptations in the oceans most colorful invertebrates. Nudibranchs, or sea slugs, have a remarkable range of adaptations to survive in the ocean. From weaponizing stinging cells, harvesting the power of the sun, spraying sulfuric acid, and turning their bodies into drift nets.

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?

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.

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.

The fire ant strikes fear in all those who cross its path, and with good reason: this ant is taking over the world. A colony can contain up to 40 million individuals.It exterminates all other species, confiscates food for its own use, and ferociously defends its territory.

The Cuban crocodile is an endangered species poised to disappear. Meet the people trying to save this unique animal from extinction.

In 1938, an American psychologist and ethnologist captured 500 macaque monkeys and brought them to a remote and uninhabited Caribbean island. His project was to study a primate population roaming free, in a giant open-air laboratory.

Have you ever wondered what happens behind closed doors at zoos and aquariums? What do the animals do when no one is around to watch them? Catch a glimpse at the quirky happenings that guests normally don’t get to see.

The Iberian Lynx, classified as the world’s most endangered cat, was once close to total extinction. Today, a group of scientists and conservationists are battling to repopulate the species, giving hope that these elusive animals may one day make a comeback.

Wildlife tracker Tyler Johnerson explores the deadly rivalry that's developed between native mountain lions and reintroduced wolves in Yellowstone National Park.

A cheetah raises her young family on the vast expanse of the Serengeti, facing enormous challenges. Lions are quick to throw their muscle around, and hyenas and jackals attempt to steal anything the cheetah manages to kill. The cubs will have to learn fast if they're going to survive.

The ghost cat is one of the most elusive animals roaming the wilderness. Adaptable and resilient, these cats dictate a precarious cycle of life for the creatures who share their home. In the cold, inhospitable mountains above Chile, a single mother raises her three cubs.

Few things are more wondrous than the gift of flight, but some birds have chosen to give it up – the question is, why? Whether it is to save energy, tap into new food resources, or invest in other skills, they all have their reasons.

Monkeys are some of the most evolutionarily successful species on the planet, from Japanese snow monkeys to African baboons. Loveable, aggressive, and full of mischief, our distant cousins have much in common with us. Swinging through our primate family tree quickly reveals the diversity.

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.

The endless plains of East Africa is a paradise for lions. The most social of all cats, lions form prides that are unlike any other animals. Together, they’ll hunt, raise their young and defend their territory. The pride welcomes new babies every year, but new children bring new dangers.

An alien world of bizarre creatures exists in the surface film of most lakes and ponds - tiny insects, with incredible capabilities, locked in a life and death struggle to survive.

An alarming decline in insect populations could devastate all life on earth. What's causing it, and can anything be done to stop it?

The North Atlantic Right Whale is on the verge of extinction. The leading cause of death and injury to the whales is from ship strikes or entanglement in fishing lines. In this Breakthrough episode, we will hear from the leading experts and biologists who are racing to save this species.

New research reveals how incredible these ancient, unchanged reptiles really are - partly because of what’s called negligible senescence. This means that Alligators show almost no signs of aging -- regardless of how long they live - and that they are “biologically immortal.”

Without insects, we could not exist. Journey to the extraordinary hidden realm of the colorful and diverse insects that contribute to the growth and survival of the natural world. Through cutting-edge macroscopic technology, we meet a cast of insect “characters,” from the beautiful to the bizarre.

This is the mesmerizing odyssey of Holly Carroll, a passionate zoologist who explores the dense rainforests and remote jungles of Africa and Indonesia to study the lives of these intelligent and curious animals: the great apes.

Whales have long been a profound mystery to us. They live in a world so removed from our own that we can barely imagine their lives. Their environment is different, their senses are different, their relationships are different. How might such almost alien creatures see the world?

More beautiful than butterflies, more spectacular fliers than hummingbirds, and with intriguing behavior as complex as mammals or birds. They’ve been flying around for hundreds of millions of years, crossing paths with dinosaurs before we mammals were even a twinkle in the eye of evolution.

It’s the dry season near the Serengeti and hungry lions threaten the livelihood of cattle-herder Rugari and his family. He could kill the predatory lions and protect his cattle, but his daughter seeks another solution. Filmed on location in Tanzania—where the worlds of lions and humans collide.

Wildlife expert and photographer, Casey Anderson, introduces us to some amazing wildlife in Yellowstone!

In this unprecedented series, recent scientific discoveries shed new light on the extraordinary prehistory of big cats.

Big cat populations are shrinking fast, but now we have the means to view them in more detail than ever.

Equipped with a cutting-edge infrared drone, Doug Thron heads into disaster zones to save the cats and dogs that have been left behind.

The ultimate guide to invertebrates, with key biological themes to show a wide range of species.

Join filmmaker Casey Anderson as he embeds in the Alaskan wilderness to follow the largest terrestrial carnivores in the world.

Equipped with a cutting-edge infrared drone, Doug Thron heads into disaster zones to save the cats and dogs that have been left behind.

Circle the globe on this exhilarating 5-part epic that “connects the dots" between the GIANTS of the natural world, past and present.

The Essequibo is a hidden river deep in the heart of the Amazon rainforest, virtually undetectable from the air.

Dr. Jane Goodall and her staff prepare to reintroduce a special group of rescued and rehabilitated chimpanzees to the wild.

Nepal is known for its Bengal tigers, but only 300 remain in the wild. Tracker Casey Anderson is determined to walk in their footsteps.