They're our favorite pets and loyal companions — you might even call them family. Grab the chew toys and snuggle up with man's best friend.

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

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

Doug to the Rescue (Season 2)

They might not look as impressive as wolves, but the little dogs of the world are just as complex and endearing. By following dog families from across the world, we’ll see the similarities and differences in how they live, from how they interact and defend themselves to how they find food.

There’s a huge variety in the canine clan, but one thing unites all the little dog families: their big personalities.

Little Dogs, Big Personalities

A dog's sense of smell can do amazing things. Dogs can help humans sniff out all kinds of things that improve our lives, explosives, missing persons, illegal drugs. Now the latest research is revealing that dogs can detect disease, even cancer.

A dog's sense of smell can do amazing things. Dogs can help humans sniff out all kinds of things that improve our lives, explosives, missing persons, illegal drugs.

Secrets of a Dog's Nose

From the arctic tundra to the great planes, the kingdom of the wolf extends across the entire northern hemisphere. They are icons of the wilderness, spectacular creatures that live and die by the sword.

Wolves: icons of the wilderness, spectacular creatures that live and die by the sword.

Wolves - Power of the Pack

This countdown is going to the dogs! Come along for seven of Jack’s favorite dog days from a lifetime of walking, chasing, and playing with human’s best friend.

Top Dogs

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.

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?

What Animals See

Humans have evolved alongside millions of species, but we've invited only 2 of them out of the wild into our homes. Discover the furball history of Cats & Dogs, from caveman to Instagram, hunting companion to pampered pooch - with 7.4 million likes and 6.8 billion snapshots of our cuddly companions.

This is the furball history of our ancient fuzzy friends, who stand by our side, cuddle in our lap, and remind us we're never alone…

Cats & Dogs

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

Tyler Johnerson explores the deadly rivalry between native mountain lions and reintroduced wolves in Yellowstone National Park.

America's Wildest Cat & Dog Rivalry

As catastrophic numbers of stray dogs roam the streets of Houston, Texas, twin sisters Tena and Tama Lundquist take matters into their own hands in order to save the animals they love.

As catastrophic numbers of stray dogs roam the streets of Houston, Texas, twin sisters take matters into their own hands to save the animals they love.