From: National Geographic Channel on Tue, Sep 28 2010 4:59 PM

Cesar plays matchmaker for two lonely dogs.

From: National Geographic Channel on Fri, Sep 24 2010 1:53 PM

Many grizzly bear attacks are brought on by surprise encounters - a keen eye for signs of grizzlies can save your life.

From: National Geographic Channel on Fri, Sep 24 2010 1:53 PM

In order to protect himself in the wild, Casey always brings along a bear pepper spray that can disable a bears sense of smell.

From: National Geographic Channel on Fri, Sep 24 2010 1:37 PM

Scientists make new discovery: oil plumes may do permanent damage to DNA - and trigger mutations.

From: National Geographic Channel on Fri, Sep 24 2010 1:37 PM

Join the teams on the front lines of the gulf coast working to contain the spill 50 miles off shore.

From: National Geographic Channel on Fri, Sep 24 2010 1:37 PM

Cesar teaches a dog-owner how to be confident enough to train her excitable pet.

From: National Geographic Channel on Fri, Sep 24 2010 1:37 PM

Cesar meets Chloe, a dog scheduled to be put to sleep in a week for her beahvior. Can he save this dog before it’s too late?

From: National Geographic Channel on Fri, Sep 24 2010 1:37 PM

In this lion pride, the teenage boys aren’t pulling their weight. Instead of hunting, they'd rather nap.

From: National Geographic Channel on Fri, Sep 24 2010 1:34 PM

A pack of hungry lions descend upon a giraffe and her defenseless foal.

From: National Geographic Channel on Tue, Sep 21 2010 4:20 AM

Explorer Enrique Sala discovers more than 50 sharks in a lagoon - good news for the health of its species.

From: National Geographic Channel on Sat, Sep 18 2010 6:13 PM

An unprecedented amount of oil dispersant has been used to clean up the gulf - what will the environmantal costs be?

From: National Geographic Channel on Sat, Sep 18 2010 6:13 PM

An unprecedented amount of oil dispersant has been used to clean up the gulf - what will the environmantal costs be?

From: National Geographic Channel on Fri, Sep 17 2010 2:44 PM

Who knew wild dogs could be so civilized? When the pack finally catches its prey, the dogs solemnly eat their meal.

From: National Geographic Channel on Fri, Sep 17 2010 2:44 PM

National Geographic takes you inside BP’s command center during the well cap.

From: National Geographic Channel on Fri, Sep 17 2010 2:44 PM

National Geographic takes you inside BP’s command center during the well cap.

From: National Geographic Channel on Fri, Sep 17 2010 2:42 PM

This wild dog pack defends some of the cutest puppies you’ll ever see against prowling hyenas.

From: National Geographic Channel on Fri, Sep 17 2010 2:42 PM

This wild dog pack defends some of the cutest puppies you’ll ever see against prowling hyenas.

From: National Geographic Channel on Thu, Sep 16 2010 10:37 AM

Where there’s a carcass, there's a wolf pack. Casey finds one and quietly watches a pack in action.

From: National Geographic Channel on Thu, Sep 16 2010 10:37 AM

Where there’s a carcass, there's a wolf pack. Casey finds one and quietly watches a pack in action.

From: National Geographic Channel on Thu, Sep 16 2010 10:22 AM

Howie Mandel is under attack — from one of the tiniest and fiercest dogs you’ll ever meet. Can Cesar help to ease the tension?