Across the animal kingdom, some of the most essential lessons -- and the most extreme challenges -- occur in the first moments of life.

(Airs Sunday, March 14) In the mating game, it is not always "do or die," but the penalties can be severe, and there is no tried and true approach when it comes to attracting a mate.

(Airs Sunday, May 23) Are you cat-crazy or a dog die-hard? Watch as NATURE shares the stories of pet owners and their beloved animals.

A growing number of invasive Burmese pythons have taken up residence in the wetlands of Florida.

Crow experts from around the world present us with captivating new footage of crows as we have never seen them before.

The two-part special "Dogs That Changed the World" tells the epic story of the wolf's evolution, how "man's best friend" changed human society and how we in turn have radically transformed dogs.

These tiny marvels dazzle and delight bird watchers all over the world, and NATURE reveals their stunning abilities as they have never been seen before.

Conservationist Rom Whitaker searches for the last of the supersize crocodiles among the titans of the croc world: Nile crocodiles, saltwater crocodiles, and gharials.

Just how smart are monkeys? Their curiosity leads them to try new things, but it’s their culture that teaches them much of what they know.