After lions kill a some members of their pack, Puzzles and the other wild dogs remain on the lookout.
A curious young jaguar finds a strange new toy -- but this one bites back.
Great Migrations -- A global television event coming this fall to National Geographic Channel.
Some scientists believe the stegosaurus' intimidating spikes were used more for attracting mates than they were for body armor.
This thirsty elephant crosses a river up to his shoulders to sate his appetite, and cool off a bit.
Where there's a carcass, there's a wolf pack. Casey finds one and quietly watches a pack in action.
A White Rhino bull makes a few advances on a Rhino cow, but things don't always go that smoothly when it comes to romance.
On a cold night, lions roar to each other.
Same Sex Marriage
Just how accurate is human memory?
Eamon wants to prove to his Korean girlfriend s parents that though he s from Ireland, he and Hannah aren't really worlds apart.
A Golden Retriever Lab mix has chronic digestive problems that threaten her life.
You may be wondering, who's hassling who?
From total peaceful sleep relaxation to frenzied huffing, puffing and roaring, and back again.
Two young cubs emerge from their den to see the cameraman and truck for the first time, a spell-binding experience.